And as it is the most generous souls who have most gratitude, it is those who have most pride, and who are most base and infirm, who most allow themselves to be carried away by anger and hatred.

I think; therefore I am.

It is to the body alone that we should attribute everything that can be observed in us to oppose our reason.

I was convinced that our beliefs are based much more on custom and example than on any certain knowledge.

Perfect numbers like perfect men are very rare.

Omnia apud me mathematica fiunt.

On the one hand I have a clear and distinct idea of myself, in so far as I am a thinking, non-extended thing; and on the other hand I have a distinct idea of body, in so far a this is simply an extended, non-thinking thing. And, accordingly, it is certain that I am really distinct from my body, and exist without it.