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Knowledge
Is Not Ultimately Sense Knowledge
by René Descartes
MEDITATION
I
Of the Things Which May Be Brought within the
Sphere of the Doubtful
Several years have now elapsed since I first
became aware that I had accepted, even from my
youth, many false opinions for true, and that
consequently what I afterward based on such
principles was highly doubtful; and from that time
I was convinced of the necessity of undertaking
once in my life to rid myself of all the opinions I
had adopted, and of commencing anew the work of
building from the foundation, if I desired to
establish a firm and abiding superstructure in the
sciences. But as this enterprise appeared to me to
be one of great magnitude, I waited until I had
attained an age so mature as to leave me no hope
that at any stage of life more advanced I should be
better able to execute my design. On this account,
I have delayed so long that I should henceforth
consider I was doing wrong were I still to consume
in deliberation any of the time that now remains
for action. To-day, then, since I have opportunely
freed my mind from all cares [and am happily
disturbed by no passions], and since I am in
the secure possession of leisure in a peaceable
retirement, I will at length apply myself earnestly
and freely to the general overthrow of all my
former opinions.
But, to this end, it will not be necessary for
me to show that the whole of these are false--a
point, perhaps, which I shall never reach; but as
even now my reason convinces me that I ought not
the less carefully to withhold belief from what is
not entirely certain and indubitable, than from
what is manifestly false, it will be sufficient to
justify the rejection of the whole if I shall find
in each some ground for doubt. Nor for this purpose
will it be necessary even to deal with each belief
individually, which would be truly an endless
labor; but, as the removal from below of the
foundation necessarily involves the downfall of the
whole edifice, I will at once approach the
criticism of the principles on which all my former
beliefs rested.
All that I have, up to this moment, accepted as
possessed of the highest truth and certainty, I
received either from or through the senses. I
observed, however, that these sometimes misled us;
and it is the part of prudence not to place
absolute confidence in that by which we have even
once been deceived.
But it may be said, perhaps, that, although the
senses occasionally mislead us respecting minute
objects, and such as are so far removed from us as
to be beyond the reach of close observation, there
are yet many other of their informations
(presentations), of the truth of which it is
manifestly impossible to doubt; as for example,
that I am in this place, seated by the fire,
clothed in a winter dressing gown, that I hold in
my hands this piece of paper, with other
intimations of the same nature. But how could I
deny that I possess these hands and this body, and
withal escape being classed with persons in a state
of insanity, whose brains are so disordered and
clouded by dark bilious vapors as to cause them
pertinaciously to assert that they are monarchs
when they are in the greatest poverty; or clothed
[in gold] and purple when destitute of any
covering; or that their head is made of clay, their
body of glass, or that they are gourds? I should
certainly be not less insane than they, were I to
regulate my procedure according to examples so
extravagant.
Though this be true, I must nevertheless here
consider that I am a man, and that, consequently, I
am in the habit of sleeping, and representing to
myself in dreams those same things, or even
sometimes others less probable, which the insane
think are presented to them in their waking
moments. How often have I dreamt that I was in
these familiar circumstances, that I was dressed,
and occupied this place by the fire, when I was
lying undressed in bed? At the present moment,
however, I certainly look upon this paper with eyes
wide awake; the head which I now move is not
asleep; I extend this hand consciously and with
express purpose, and I perceive it; the occurrences
in sleep are not so distinct as all this. But I
cannot forget that, at other times I have been
deceived in sleep by similar illusions; and,
attentively considering those cases, I perceive so
clearly that there exist no certain marks by which
the state of waking can ever be distinguished from
sleep, that I feel greatly astonished; and in
amazement I almost persuade myself that I am now
dreaming.
Let us suppose, then, that we are dreaming, and
that all these particulars--namely, the opening of
the eyes, the motion of the head, the forth-
putting of the hands--are merely illusions; and
even that we really possess neither an entire body
nor hands such as we see. Nevertheless it must be
admitted at least that the objects which appear to
us in sleep are, as it were, painted
representations which could not have been formed
unless in the likeness of realities; and,
therefore, that those general objects, at all
events, namely, eyes, a head, hands, and an entire
body, are not simply imaginary, but really
existent. For, in truth, painters themselves, even
when they study to represent sirens and satyrs by
forms the most fantastic and extraordinary, cannot
bestow upon them natures absolutely new, but can
only make a certain medley of the members of
different animals; or if they chance to imagine
something so novel that nothing at all similar has
ever been seen before, and such as is, therefore,
purely fictitious and absolutely false, it is at
least certain that the colors of which this is
composed are real. And on the same principle,
although these general objects, viz. [a
body], eyes, a head, hands, and the like, be
imaginary, we are nevertheless absolutely
necessitated to admit the reality at least of some
other objects still more simple and universal than
these, of which, just as of certain real colors,
all those images of things, whether true and real,
or false and fantastic, that are found in our
consciousness (cogitatio), are formed.
To this class of objects seem to belong
corporeal nature in general and its extension; the
figure of extended things, their quantity or
magnitude, and their number, as also the place in,
and the time during, which they exist, and other
things of the same sort.
We will not, therefore, perhaps reason
illegitimately if we conclude from this that
Physics, Astronomy, Medicine, and all the other
sciences that have for their end the consideration
of composite objects, are indeed of a doubtful
character; but that Arithmetic, Geometry, and the
other sciences of the same class, which regard
merely the simplest and most general objects, and
scarcely inquire whether or not these are really
existent, contain somewhat that is certain and
indubitable: for whether I am awake or dreaming, it
remains true that two and three make five, and that
a square has but four sides; nor does it seem
possible that truths so apparent can ever fall
under a suspicion of falsity [or
incertitude].
Nevertheless, the belief that there is a God who
is all powerful, and who created me, such as I am,
has, for a long time, obtained steady possession of
my mind. How, then, do I know that he has not
arranged that there should be neither earth, nor
sky, nor any extended thing, nor figure, nor
magnitude, nor place, providing at the same time,
however, for [the rise in me of the perceptions
of all these objects, and] the persuasion that
these do not exist otherwise than as I perceive
them? And further, as I sometimes think that others
are in error respecting matters of which they
believe themselves to possess a perfect knowledge,
how do I know that I am not also deceived each time
I add together two and three, or number the sides
of a square, or form some judgment still more
simple, if more simple indeed can be imagined? But
perhaps Deity has not been willing that I should be
thus deceived, for he is said to be supremely good.
If, however, it were repugnant to the goodness of
Deity to have created me subject to constant
deception, it would seem likewise to be contrary to
his goodness to allow me to be occasionally
deceived; and yet it is clear that this is
permitted.
Some, indeed, might perhaps be found who would
be disposed rather to deny the existence of a Being
so powerful than to believe that there is nothing
certain. But let us for the present refrain from
opposing this opinion, and grant that all which is
here said of a Deity is fabulous: nevertheless, in
whatever way it be supposed that I reach the state
in which I exist, whether by fate, or chance, or by
an endless series of antecedents and consequents,
or by any other means, it is clear (since to be
deceived and to err is a certain defect ) that the
probability of my being so imperfect as to be the
constant victim of deception, will be increased
exactly in proportion as the power possessed by the
cause, to which they assign my origin, is lessened.
To these reasonings I have assuredly nothing to
reply, but am constrained at last to avow that
there is nothing of all that I formerly believed to
be true of which it is impossible to doubt, and
that not through thoughtlessness or levity, but
from cogent and maturely considered reasons; so
that henceforward, if I desire to discover anything
certain, I ought not the less carefully to refrain
from assenting to those same opinions than to what
might be shown to be manifestly false.
But it is not sufficient to have made these
observations; care must be taken likewise to keep
them in remembrance. For those old and customary
opinions perpetually recur-- long and familiar
usage giving them the right of occupying my mind,
even almost against my will, and subduing my
belief; nor will I lose the habit of deferring to
them and confiding in them so long as I shall
consider them to be what in truth they are, viz,
opinions to some extent doubtful, as I have already
shown, but still highly probable, and such as it is
much more reasonable to believe than deny. It is
for this reason I am persuaded that I shall not be
doing wrong, if, taking an opposite judgment of
deliberate design, I become my own deceiver, by
supposing, for a time, that all those opinions are
entirely false and imaginary, until at length,
having thus balanced my old by my new prejudices,
my judgment shall no longer be turned aside by
perverted usage from the path that may conduct to
the perception of truth. For I am assured that,
meanwhile, there will arise neither peril nor error
from this course, and that I cannot for the present
yield too much to distrust, since the end I now
seek is not action but knowledge.
I will suppose, then, not that Deity, who is
sovereignly good and the fountain of truth, but
that some malignant demon, who is at once
exceedingly potent and deceitful, has employed all
his artifice to deceive me; I will suppose that the
sky, the air, the earth, colors, figures, sounds,
and all external things, are nothing better than
the illusions of dreams, by means of which this
being has laid snares for my credulity; I will
consider myself as without hands, eyes, flesh,
blood, or any of the senses, and as falsely
believing that I am possessed of these; I will
continue resolutely fixed in this belief, and if
indeed by this means it be not in my power to
arrive at the knowledge of truth, I shall at least
do what is in my power, viz, [ suspend my
judgment ], and guard with settled purpose
against giving my assent to what is false, and
being imposed upon by this deceiver, whatever be
his power and artifice. But this undertaking is
arduous, and a certain indolence insensibly leads
me back to my ordinary course of life; and just as
the captive, who, perchance, was enjoying in his
dreams an imaginary liberty, when he begins to
suspect that it is but a vision, dreads awakening,
and conspires with the agreeable illusions that the
deception may be prolonged; so I, of my own accord,
fall back into the train of my former beliefs, and
fear to arouse myself from my slumber, lest the
time of laborious wakefulness that would succeed
this quiet rest, in place of bringing any light of
day, should prove inadequate to dispel the darkness
that will arise from the difficulties that have now
been raised.
MEDITATION
II
Of the Nature of the Human Mind, and That It
Is More Easily Known Than the Body
The Meditation of yesterday has filled my mind
with so many doubts, that it is no longer in my
power to forget them. Nor do I see, meanwhile, any
principle on which they can be resolved; and, just
as if I had fallen all of a sudden into very deep
water, I am so greatly disconcerted as to be unable
either to plant my feet firmly on the bottom or
sustain myself by swimming on the surface. I will,
nevertheless, make an effort, and try anew the same
path on which I had entered yesterday, that is,
proceed by casting aside all that admits of the
slightest doubt, not less than if I had discovered
it to be absolutely false; and I will continue
always in this track until I shall find something
that is certain, or at least, if I can do nothing
more, until I shall know with certainty that there
is nothing certain. Archimedes, that he might
transport the entire globe from the place it
occupied to another, demanded only a point that was
firm and immovable; so, also, I shall be entitled
to entertain the highest expectations, if I am
fortunate enough to discover only one thing that is
certain and indubitable.
I suppose, accordingly, that all the things
which I see are false (fictitious); I believe that
none of those objects which my fallacious memory
represents ever existed; I suppose that I possess
no senses; I believe that body, figure, extension,
motion, and place are merely fictions of my mind.
What is there, then, that can be esteemed true?
Perhaps this only, that there is absolutely nothing
certain.
But how do I know that there is not something
different altogether from the objects I have now
enumerated, of which it is impossible to entertain
the slightest doubt? Is there not a God, or some
being, by whatever name I may designate him, who
causes these thoughts to arise in my mind ? But why
suppose such a being, for it may be I myself am
capable of producing them? Am I, then, at least not
something? But I before denied that I possessed
senses or a body; I hesitate, however, for what
follows from that? Am I so dependent on the body
and the senses that without these I cannot exist?
But I had the persuasion that there was absolutely
nothing in the world, that there was no sky and no
earth, neither minds nor bodies; was I not,
therefore, at the same time, persuaded that I did
not exist? Far from it; I assuredly existed, since
I was persuaded. But there is I know not what
being, who is possessed at once of the highest
power and the deepest cunning, who is constantly
employing all his ingenuity in deceiving me.
Doubtless, then, I exist, since I am deceived; and,
let him deceive me as he may, he can never bring it
about that I am nothing, so long as I shall be
conscious that I am something. So that it must, in
fine, be maintained, all things being maturely and
carefully considered, that this proposition
(pronunciatum) I am, I exist, is necessarily
true each time it is expressed by me, or conceived
in my mind.
But I do not yet know with sufficient clearness
what I am, though assured that I am; and hence, in
the next place, I must take care, lest perchance I
inconsiderately substitute some other object in
room of what is properly myself, and thus wander
from truth, even in that knowledge (cognition)
which I hold to be of all others the most certain
and evident. For this reason, I will now consider
anew what I formerly believed myself to be, before
I entered on the present train of thought; and of
my previous opinion I will retrench all that can in
the least be invalidated by the grounds of doubt I
have adduced, in order that there may at length
remain nothing but what is certain and
indubitable.
What then did I formerly think I was?
Undoubtedly I judged that I was a man. But what is
a man? Shall I say a rational animal? Assuredly
not; for it would be necessary forthwith to inquire
into what is meant by animal, and what by rational,
and thus, from a single question, I should
insensibly glide into others, and these more
difficult than the first; nor do I now possess
enough of leisure to warrant me in wasting my time
amid subtleties of this sort. I prefer here to
attend to the thoughts that sprung up of themselves
in my mind, and were inspired by my own nature
alone, when I applied myself to the consideration
of what I was. In the first place, then, I thought
that I possessed a countenance, hands, arms, and
all the fabric of members that appears in a corpse,
and which I called by the name of body. It further
occurred to me that I was nourished, that I walked,
perceived, and thought, and all those actions I
referred to the soul; but what the soul itself was
I either did not stay to consider, or, if I did, I
imagined that it was something extremely rare and
subtile, like wind, or flame, or ether, spread
through my grosser parts. As regarded the body, I
did not even doubt of its nature, but thought I
distinctly knew it, and if I had wished to describe
it according to the notions I then entertained, I
should have explained myself in this manner: By
body I understand all that can be terminated by a
certain figure; that can be comprised in a certain
place, and so fill a certain space as therefrom to
exclude every other body; that can be perceived
either by touch, sight, hearing, taste, or smell;
that can be moved in different ways, not indeed of
itself, but by something foreign to it by which it
is touched [and from which it receives the
impression]; for the power of self-motion, as
likewise that of perceiving and thinking, I held as
by no means pertaining to the nature of body; on
the contrary, I was somewhat astonished to find
such faculties existing in some bodies.
But [as to myself, what can I now say that I
am], since I suppose there exists an extremely
powerful, and, if I may so speak, malignant being,
whose whole endeavors are directed toward deceiving
me? Can I affirm that I possess any one of all
those attributes of which I have lately spoken as
belonging to the nature of body? After attentively
considering them in my own mind, I find none of
them that can properly be said to belong to myself.
To recount them were idle and tedious. Let us pass,
then, to the attributes of the soul. The first
mentioned were the powers of nutrition and walking;
but, if it be true that I have no body, it is true
likewise that I am capable neither of walking nor
of being nourished. Perception is another attribute
of the soul; but perception too is impossible
without the body; besides, I have frequently,
during sleep, believed that I perceived objects
which I afterward observed I did not in reality
perceive. Thinking is another attribute of the
soul; and here I discover what properly belongs to
myself. This alone is inseparable from me. I am--I
exist: this is certain; but how often? As often as
I think; for perhaps it would even happen, if I
should wholly cease to think, that I should at the
same time altogether cease to be. I now admit
nothing that is not necessarily true. I am
therefore, precisely speaking, only a thinking
thing, that is, a mind (mens sive animus),
understanding, or reason, terms whose signification
was before unknown to me. I am, however, a real
thing, and really existent; but what thing? The
answer was, a thinking thing.
The question now arises, am I aught besides? I
will stimulate my imagination with a view to
discover whether I am not still something more than
a thinking being. Now it is plain I am not the
assemblage of members called the human body; I am
not a thin and penetrating air diffused through all
these members, or wind, or flame, or vapor, or
breath, or any of all the things I can imagine; for
I supposed that all these were not, and, without
changing the supposition, I find that I still feel
assured of my existence. But it is true, perhaps,
that those very things which I suppose to be
non-existent, because they are unknown to me, are
not in truth different from myself whom I know.
This is a point I cannot determine, and do not now
enter into any dispute regarding it. I can only
judge of things that are known to me: I am
conscious that I exist, and I who know that I exist
inquire into what I am. It is, however, perfectly
certain that the knowledge of my existence, thus
precisely taken, is not dependent on things, the
existence of which is as yet unknown to me: and
consequently it is not dependent on any of the
things I can feign in imagination. Moreover, the
phrase itself, I frame an image (efffingo),
reminds me of my error; for I should in truth frame
one if I were to imagine myself to be anything,
since to imagine is nothing more than to
contemplate the figure or image of a corporeal
thing; but I already know that I exist, and that it
is possible at the same time that all those images,
and in general all that relates to the nature of
body, are merely dreams [or chimeras]. From
this I discover that it is not more reasonable to
say, I will excite my imagination that I may know
more distinctly what I am, than to express myself
as follows: I am now awake, and perceive something
real; but because my perception is not sufficiently
clear, I will of express purpose go to sleep that
my dreams may represent to me the object of my
perception with more truth and clearness. And,
therefore, I know that nothing of all that I can
embrace in imagination belongs to the knowledge
which I have of myself, and that there is need to
recall with the utmost care the mind from this mode
of thinking, that it may be able to know its own
nature with perfect distinctness.
But what, then, am I? A thinking thing, it has
been said. But what is a thinking thing? It is a
thing that doubts, understands,
[conceives], affirms, denies, wills,
refuses; that imagines also, and perceives.
Assuredly it is not little, if all these
properties belong to my nature. But why should they
not belong to it? Am I not that very being who now
doubts of almost everything; who, for all that,
understands and conceives certain things; who
affirms one alone as true, and denies the others;
who desires to know more of them, and does not wish
to be deceived; who imagines many things, sometimes
even despite his will; and is likewise percipient
of many, as if through the medium of the senses. Is
there nothing of all this as true as that I am,
even although I should be always dreaming, and
although he who gave me being employed all his
ingenuity to deceive me ? Is there also any one of
these attributes that can be properly distinguished
from my thought, or that can be said to be separate
from myself ? For it is of itself so evident that
it is I who doubt, I who understand, and I who
desire, that it is here unnecessary to add anything
by way of rendering it more clear. And I am as
certainly the same being who imagines; for although
it may be (as I before supposed) that nothing I
imagine is true, still the power of imagination
does not cease really to exist in me and to form
part of my thought. In fine, I am the same being
who perceives, that is, who apprehends certain
objects as by the organs of sense, since, in truth,
I see light, hear a noise, and feel heat. But it
will be said that these presentations are false,
and that I am dreaming. Let it be so. At all events
it is certain that I seem to see light, hear a
noise, and feel heat; this cannot be false, and
this is what in me is properly called perceiving
(sentire), which is nothing else than
thinking.
From this I begin to know what I am with
somewhat greater clearness and distinctness than
heretofore. But, nevertheless, it still seems to
me, and I cannot help believing, that corporeal
things, whose images are formed by thought
[which fall under the senses], and are
examined by the same, are known with much greater
distinctness than that I know not what part of
myself which is not imaginable; although, in truth,
it may seem strange to say that I know and
comprehend with greater distinctness things whose
existence appears to me doubtful, that are unknown,
and do not belong to me, than others of whose
reality I am persuaded, that are known to me, and
appertain to my proper nature; in a word, than
myself. But I see clearly what is the state of the
case. My mind is apt to wander, and will not yet
submit to be restrained within the limits of truth.
Let us therefore leave the mind to itself once
more, and, according to it every kind of liberty
[permit it to consider the objects that appear
to it from without], in order that, having
afterward withdrawn it from these gently and
opportunely [and fixed it on the consideration
of its being and the properties it finds in
itself], it may then be the more easily
controlled.
Let us now accordingly consider the objects that
are commonly thought to be [the most easily,
and likewise] the most distinctly known, viz,
the bodies we touch and see; not, indeed, bodies in
general, for these general notions are usually
somewhat more confused, but one body in particular.
Take, for example, this piece of wax; it is quite
fresh, having been but recently taken from the
beehive; it has not yet lost the sweetness of the
honey it contained; it still retains somewhat of
the odor of the flowers from which it was gathered;
its color, figure, size, are apparent (to the
sight); it is hard, cold, easily handled; and
sounds when struck upon with the finger. In fine,
all that contributes to make a body as distinctly
known as possible, is found in the one before us.
But, while I am speaking, let it be placed near the
fire--what remained of the taste exhales, the smell
evaporates, the color changes, its figure is
destroyed, its size increases, it becomes liquid,
it grows hot, it can hardly be handled, and,
although struck upon, it emits no sound. Does the
same wax still remain after this change? It must be
admitted that it does remain; no one doubts it, or
judges otherwise. What, then, was it I knew with so
much distinctness in the piece of wax? Assuredly,
it could be nothing of all that I observed by means
of the senses, since all the things that fell under
taste, smell, sight, touch, and hearing are
changed, and yet the same wax remains.
It was perhaps what I now think, viz, that this
wax was neither the sweetness of honey, the
pleasant odor of flowers, the whiteness, the
figure, nor the sound, but only a body that a
little before appeared to me conspicuous under
these forms, and which is now perceived under
others. But, to speak precisely, what is it that I
imagine when I think of it in this way? Let it be
attentively considered, and, retrenching all that
does not belong to the wax, let us see what
remains. There certainly remains nothing, except
something extended, flexible, and movable. But what
is meant by flexible and movable? Is it not that I
imagine that the piece of wax, being round, is
capable of becoming square, or of passing from a
square into a triangular figure ? Assuredly such is
not the case, because I conceive that it admits of
an infinity of similar changes; and I am, moreover,
unable to compass this infinity by imagination, and
consequently this conception which I have of the
wax is not the product of the faculty of
imagination. But what now is this extension? Is it
not also unknown? for it becomes greater when the
wax is melted, greater when it is boiled, and
greater still when the heat increases; and I should
not conceive [clearly and] according to
truth, the wax as it is, if I did not suppose that
the piece we are considering admitted even of a
wider variety of extension than I ever imagined, I
must, therefore, admit that I cannot even
comprehend by imagination what the piece of wax is,
and that it is the mind alone (mens, Lat.,
entendement, F.) which perceives it. I speak
of one piece in particular; for as to wax in
general, this is still more evident. But what is
the piece of wax that can be perceived only by the
[understanding or] mind? It is certainly
the same which I see, touch, imagine; and, in fine,
it is the same which, from the beginning, I
believed it to be. But (and this it is of moment to
observe) the perception of it is neither an act of
sight, of touch, nor of imagination, and never was
either of these, though it might formerly seem so,
but is simply an intuition (inspectio) of
the mind, which may be imperfect and confused, as
it formerly was, or very clear and distinct, as it
is at present, according as the attention is more
or less directed to the elements which it contains,
and of which it is composed.
But, meanwhile, I feel greatly astonished when I
observe [the weakness of my mind, and] its
proneness to error. For although, without at all
giving expression to what I think, I consider all
this in my own mind, words yet occasionally impede
my progress, and I am almost led into error by the
terms of ordinary language. We say, for example,
that we see the same wax when it is before us, and
not that we judge it to be the same from its
retaining the same color and figure: whence I
should forthwith be disposed to conclude that the
wax is known by the act of sight, and not by the
intuition of the mind alone, were it not for the
analogous instance of human beings passing on in
the street below, as observed from a window. In
this case I do not fail to say that I see the men
themselves, just as I say that I see the wax; and
yet what do I see from the window beyond hats and
cloaks that might cover artificial machines, whose
motions might be determined by springs? But I judge
that there are human beings from these appearances,
and thus I comprehend, by the faculty of judgment
alone which is in the mind, what I believed I saw
with my eyes.
The man who makes it his aim to rise to
knowledge superior to the common, ought to be
ashamed to seek occasions of doubting from the
vulgar forms of speech: instead, therefore, of
doing this, I shall proceed with the matter in
hand, and inquire whether I had a clearer and more
perfect perception of the piece of wax when I first
saw it, and when I thought I knew it by means of
the external sense itself, or, at all events, by
the common sense (sensus communis), as it is
called, that is, by the imaginative faculty; or
whether I rather apprehend it more clearly at
present, after having examined with greater care,
both what it is, and in what way it can be known.
It would certainly be ridiculous to entertain any
doubt on this point. For what, in that first
perception, was there distinct? What did I perceive
which any animal might not have perceived? But when
I distinguish the wax from its exterior forms, and
when, as if I had stripped it of its vestments, I
consider it quite naked, it is certain, although
some error may still be found in my judgment, that
I cannot, nevertheless, thus apprehend it without
possessing a human mind.
But finally, what shall I say of the mind
itself, that is, of myself? for as yet I do not
admit that I am anything but mind. What, then! I
who seem to possess so distinct an apprehension of
the piece of wax, do I not know myself, both with
greater truth and certitude, and also much more
distinctly and clearly? For if I judge that the wax
exists because I see it, it assuredly follows, much
more evidently, that I myself am or exist, for the
same reason: for it is possible that what I see may
not in truth be wax, and that I do not even possess
eyes with which to see anything; but it cannot be
that when I see, or, which comes to the same thing,
when I think I see, I myself who think am nothing.
So likewise, if I judge that the wax exists because
I touch it, it will still also follow that I am;
and if I determine that my imagination, or any
other cause, whatever it be, persuades me of the
existence of the wax, I will still draw the same
conclusion. And what is here remarked of the piece
of wax, is applicable to all the other things that
are external to me. And further, if the [notion
or] perception of wax appeared to me more
precise and distinct, after that not only sight and
touch, but many other causes besides, rendered it
manifest to my apprehension, with how much greater
distinctness must I now know myself, since all the
reasons that contribute to the knowledge of the
nature of wax, or of any body whatever, manifest
still better the nature of my mind ? And there are
besides so many other things in the mind itself
that contribute to the illustration of its nature,
that those dependent on the body, to which I have
here referred, scarcely merit to be taken into
account.
But, in conclusion, I find I have insensibly
reverted to the point I desired; for, since it is
now manifest to me that bodies themselves are not
properly perceived by the senses nor by the faculty
of imagination, but by the intellect alone; and
since they are not perceived because they are seen
and touched, but only because they are understood
[or rightly comprehended by thought], I
readily discover that there is nothing more easily
or clearly apprehended than my own mind. But
because it is difficult to rid one's self so
promptly of an opinion to which one has been long
accustomed, it will be desirable to tarry for some
time at this stage, that, by long continued
meditation, I may more deeply impress upon my
memory this new knowledge.
Excerpted from
Meditations, by René Descartes;
Translated by John Veitch (1901).
Biography in
The Radical Academy: René Descartes
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Meditations
on First
Philosophy,
by
René Descartes
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