Excerpts from Rene Descartes, Meditations on First Philosophy, Trans. Donald A. Cress, Indianapolis: Hackett Publishing Co., 1993.
Meditation One: Concerning Those Things That Can Be Called into Doubt
Several years have now passed since I first realized how many were the false opinions that in my youth I took to be true, and thus how doubtful were all the things that I subsequently built upon these opinions. From the time I became aware of this, I realized that for once I had to raze everything in my life, down to the very bottom, so as to begin again from the first foundations, if I wanted to establish anything firm and lasting in the sciences. But the task seemed so enormous that I waited for a point in my life that was so ripe that no more suitable a time for laying hold of these disciplines would come to pass. For this reason, I have delayed so long that I would be at fault were I to waste on deliberation the time that is left for action. Therefore, now that I have freed my mind from all cares, and I have secured for myself some leisurely and carefree time, I withdraw in solitude. I will, in short, apply myself earnestly and openly to the general destruction of my former opinions.
Yet to this end it will not be necessary that I show that all my opinions are false, which perhaps I could never accomplish anyway. But because reason now persuades me that I should withhold my assent no less carefully from things which are not plainly certain and indubitable than I would to what is patently false, it will be sufficient justification for rejecting them all, if I find a reason for doubting even the least of them. Nor therefore need one survey each opinion one after the other, a task of endless proportion. Rather–because undermining the foundations will cause whatever has been built upon them to fall down of its own accord– I will at once attack those principles which supported everything that I once believed.
Whatever I had admitted until now as most true I took in either from the senses or through the senses; however, I noticed that they sometimes deceived me. And it is a mark of prudence never to trust wholly in those things which have once deceived us.
But perhaps, although the senses sometimes deceive us when it is a question of very small and distant things, still there are many other matters which one certainly cannot doubt, although they are derived from the very same senses: that I am sitting here before the fireplace wearing my dressing gown, that I feel this sheet of paper in my hands, and so on. But how could one deny that these hands and that my whole body exist? Unless perhaps I should compare myself to insane people whose brains are so impaIred by a stubborn vapor from a black bile that they continually insist that they are kings when they are in utter poverty, or that they are wearing purple robes when they are naked, or that they have a head made of clay, or that they are gourds, or that they are made of glass. But they are all demented, and I would appear no less demented if I were to take their conduct as a model for myself.
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Meditation Two: Concerning the Nature of the Human Mind: That It Is Better Known Than the Body
Therefore I will suppose that all I see is false. I will believe that none of those things that my deceitful memory brings before my eyes ever existed. I thus have no senses: body, shape, extension, movement, and place are all figments of my imagination. What then will count as true? Perhaps only this one thing: that nothing is certain.
But on what grounds do I know that there is nothing over and above all those which I have just reviewed, concerning which there is not even the least cause for doubt? Is there not a God (or whatever name I might call him) who instills these thoughts in me? But why should I think that, since perhaps I myself could be the author of these things? Therefore am I not at least something? But I have already denied that I have any senses and any body. Still, I hesitate; for what follows from that? Am I so tied to the body and to the senses that I cannot exist without them? But I have persuaded myself that there is nothing at all in the world: no heaven, no earth, no minds, no bodies. Is it not then true that I do not exist? But certainly I should exist, if I were to persuade myself of something. But there is a deceiver (I know not who he is) powerful and sly in the highest degree, who is always purposely deceiving me. Then there is no doubt that I exist, if he deceives me. And deceive me as he will, he can never bring it about that I am nothing so long as I shall think that I am something. Thus it must he granted that, after weighing everything carefully and sufficiently, one must come to the considered judgment that the statement “I am, I exist” is necessarily true every time it is uttered by me or conceived in my mind.
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But now what am I, when I suppose that some deceiver-omnipotent and, if I may be allowed to say it, malicious–takes all the pains he can in order to deceive me? Can I not affirm that I possess at least a small measure of all those traits which I already have said pertain to the nature of the body? I pay attention, I think, I deliberate–but nothing happens. I am wearied of repeating this in vain. But which of these am I to ascribe to the soul? How about eating or walking? These are surely nothing but illusions, because I do not have a body. How about sensing? Again, this also does not happen without a body, and I judge that I really did not sense those many things I seemed to have sensed in my dreams. How about thinking? Here I discover that thought is an attribute that really does belong to me. This alone cannot be detached from me. I am; I exist; this is certain. But for how long? For as long as I think. Because perhaps it could also come to pass that if I should cease from all thinking I would then utterly cease to exist. I now admit nothing that is not necessarily true. I am therefore precisely only a thing that thinks; that is, a mind, or soul, or intellect, or reason–words the meaning of which I was ignorant before. Now, I am a true thing, and truly existing; but what kind of thing? I have said it already: a thing that thinks.
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Let us consider those things which are commonly believed to be the most distinctly comprehended of all: namely the bodies which we touch and see. But not bodies in general, for these generic perceptions are often somewhat more confused; rather let us consider one body in particular. Let us take, for instance, this piece of wax. It has very recently been taken from the honeycombs; it has not as yet lost all the flavor of its honey. It retains some of the smell of the flowers from which it was collected. Its color, shape, and size are obvious. It is hard and cold. It can easily be touched, and if you rap on it with a knuckle it makes a sound. In short, everything is present in it that appears to be needed in order that a body can be known as distinctly as possible. But notice that while I am speaking, it is brought close to the fire; the remaining traces of the honey flavor are purged; the odor vanishes; the color is changed; the original shape disappears. Its magnitude increases, it becomes liquid and hot, and can hardly be touched; and now, when you knock on it, it does not emit any sound. Up to this point, does the same wax remain? One must confess that it does: no one denies it; no one thinks otherwise. What was there then in the wax that was so distinctly comprehended? Certainly none of the things that I reached by means of the senses. For whatever came under taste or smell or sight or touch or hearing by now has changed, yet the wax remains.
Perhaps the wax was what I now think it is: namely that it really never was the sweetness of the honey or the fragrance of the flowers, not this whiteness, not a figure, not a sound, but a body which a little earlier manifested itself to me in these ways, and now does so in other ways. But just what precisely is this thing which I imagine thus? Let us direct our attention to this and see what remains after we have removed everything which does not belong to the wax: only that it is something extended, flexible, and subject to change. What is this flexible and mutable thing? Is it not the fact that I imagine that this wax can change from a round to a square shape, or from the latter to a rectangular shape? Not at all: for I comprehend that the wax is capable of innumerable changes, yet I cannot survey these innumerable changes by imagining them. Therefore this comprehension is not accomplished by the faculty of imagination. What is this extended thing? Is this thing’s extension also unknown? For it becomes larger in wax that is beginning to liquify, greater in boiling wax, and greater still as the heat is increased. And I would not judge rightly what the wax is if I did not believe that this wax can take on even more varieties of extension than I could ever have grasped by the imagination. It remains then for me to concede that I in no way imagine what this wax is, but perceive it by the mind only. I am speaking about this piece of wax in particular, for it is clearer in the case of wax in general. But what is this wax which is perceived only by the mind? It is the same that I see, touch, and imagine; in short it is the same as I took it to be from the very beginning. But we must take note of the fact that the perception of the wax is neither by sight, nor touch, nor imagination, nor was it ever so (although it seemed so before), but rather an inspection on the part of the mind alone.