René Descartes Quotes

Nothing can be imagined which is too strange or incredible to have been said by some philosopher.

...the perusal of all excellent books is, as it were, to interview with the noblest men of past ages, who have written them.

Bad books engender bad habits, but bad habits engender good books.

Right understanding is the most equally divided thing in the World; for every one beleevs himself so well stor’d with it, that even those who in all other things are the hardest to be pleas’d, seldom desire more of it then they have; wherein it is not likely that all Men are deceived:

I suppose therefore that all things I see are illusions; I believe that nothing has ever existed of everything my lying memory tells me. I think I have no senses. I believe that body, shape, extension, motion, location are functions. What is there then that can be taken as true? Perhaps only this one thing, that nothing at all is certain.

The very desire to seek the truth often causes people, who do not know how it should be sought correctly, to make judgements about things that they do not perceive and in that way they make mistakes.

I did not imitate the skeptics who doubt only for doubting’s sake, and pretend to be always undecided; on the contrary, my whole intention was to arrive at a certainty, and to dig away the drift and the sand until I reached the rock or the clay beneath.

Zira bilimlerin hepsi insan bilgeliğinden (humana sapientia) başka bir şey değildir ve nasıl ki şeylerin çeşit çeşit olması, onları aydınlatan güneşin doğasında bir fark yaratmıyorsa, akıl da ne kadar farklı konuyla ilgilenirse ilgilensin hep bir ve aynı kalır. Dolayısıyla insan aklının herhangi bir sınırlamaya ihtiyacı yoktur. Bir doğrunun bilinmesi, bir sanatı edinmenin bir diğerini edinmeyi engellemesi gibi değildir; başka bir doğrunun bilinmesine engel olmasının aksine bu konuda bize yardımcı bile olur.

"I am in doubt as to the propriety of making my first meditations in the place above mentioned matter of discourse; for these are so metaphysical, and so uncommon, as not, perhaps, to be acceptable to every one. And yet, that it may be determined whether the foundations that I have laid are sufficiently secure, I find myself in a measure constrained to advert to them. I had long before remarked that, in relation to practice, it is sometimes necessary to adopt, as if above doubt, opinions which we discern to be highly uncertain, as has been already said; but as I then desired to give my attention solely to the search after truth, I thought that a procedure exactly the opposite was called for, and that I ought to reject as absolutely false all opinions in regard to which I could suppose the least ground for doubt, in order to ascertain whether after that there remained aught in my belief that was wholly indubitable. Accordingly, seeing that our senses sometimes deceive us, I was willing to suppose that there existed nothing really such as they presented to us; and because some men err in reasoning, and fall into paralogisms, even on the simplest matters of geometry, I, convinced that I was as open to error as any other, rejected as false all the reasonings I had hitherto taken for demonstrations; and finally, when I considered that the very same thoughts (presentations) which we experience when awake may also be experienced when we are asleep, while there is at that time not one of them true, I supposed that all the objects (presentations) that had ever entered into my mind when awake, had in them no more truth than the illusions of my dreams. But immediately upon this I observed that, whilst I thus wished to think that all was false, it was absolutely necessary that I, who thus thought, should be somewhat; and as I observed that this truth, I think, therefore I am ["cogito ergo sum"], was so certain and of such evidence that no ground of doubt, however extravagant, c

[I]t seems to be just as foolish to say, 'I imagine, in order to understand more clearly what I am,' as to say, 'I am now clearly awake and I see something true, but because I do not yet see it clearly enough I shall fall asleep so that my dreams will represent it to me more truly and clearly.

That is why I can’t in any way approve of those MEDDLESOME and RESTLESS characters who, without being called by BIRTH or by FORTUNE to the management of public affairs, are yet forever thinking up some new reform! If I thought this present work contained the SLIGHTEST ground for suspecting me of such FOLLY, I would SHRINK from allowing it to be published! My plan has NEVER gone beyond trying to reform my own thoughts and to build on a foundation that is ALL MY OWN. If I’m pleased enough with my work to present you with this sketch of it, it’s not because I would advise anyone to imitate it. Those on whom GOD has bestowed more of his favours than he has on me will PERHAPS have higher aims; but I’m afraid that this project of mine may be too bold for many people! The mere decision to rid myself all the opinions I have hitherto accepted isn’t an example that everyone ought to follow! The world is mostly made up of two types of minds for whom it is QUITE unsuitable. (1) There are those who, believing themselves cleverer than they are, can’t help rushing to judgment and can’t muster the patience to direct all their thoughts in an ORDERLY manner. So that if they ONCE took the liberty of doubting the principles they have accepted and leaving the common path, they would NEVER be able to stay on the straighter path that they ought to take, AND would REMAIN lost ALL their LIVES. (2) And there are those who are reasonable enough, or modest enough, to THINK that they can’t distinguish true from false as well as some other people by whom they can be taught. THESE should be content to follow the opinions of those others rather than to seek better opinions themselves.

Therefore from the fact alone that I know that I exist and that, at the same time, I notice absolutely nothing else that belongs to my nature apart from the single fact that I am a thinking thing, I correctly conclude that my essence consists in this alone, that I am a thinking thing.

Let whoever can do so deceive me, he will never bring it about that I am nothing, so long as I continue to think I am something.

我思う故に我あり

He cannot be a deceiver, since the light of nature teaches us that fraud and deception necessarily proceed from some defect.