I am indeed amazed when I consider how weak my mind is and how prone to error.

Truths are more likely to be discovered by one man than by a nation

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

Common sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it.

There is a little gland in the brain in which the soul exercises its functions in a more particular way than in the other parts.

Mathematics is a more powerful instrument of knowledge than any other that has been bequeathed to us by human agency.

Give me extension and motion and I will construct the universe.