There is nothing so far removed from us as to be beyond our reach, or so hidden that we cannot discover it.

Now therefore, that my mind is free from all cares, and that I have obtained for myself assured leisure in peaceful solitude, I shall apply myself seriously and freely to the general destruction of all my former opinions.

So far, I have been a spectator in this theater which is the world, but I am now about to mount the stage, and I come forward masked.

There is nothing so strange and so unbelievable that it has not been said by one philosopher or another.

Each problem that I solved became a rule, which served afterwards to solve other problems.

Even those who have the weakest souls could acquire absolute mastery over all their passions if we employed sufficient ingenuity in training and guiding them.

We call infinite that thing whose limits we have not perceived, and so by that word we do not signify what we understand about a thing, but rather what we do not understand.