An optimist may see a light where there is none, but why must the pessimist always run to blow it out?

God alone is the author of all the motions in the world.

It is contrary to reasoning to say that there is a vacuum or space in which there is absolutely nothing.

When writing about transcendental issues, be transcendentally clear.

There is nothing more ancient than the truth.

It is not enough to have a good mind. The main thing is to use it well.

If I go for the alternative which is false, then obviously I shall be in error; if I take the other side, then it is by... chance that I arrive at the truth, and I shall still be at fault.... In this incorrect use of free will may be found the privation which constitutes the essence of error.