Nature is an infinite sphere of which the center is everywhere and the circumference nowhere.

We should seek the truth without hesitation; and, if we refuse it, we show that we value the esteem of men more than the search for truth.

It is not permitted to the most equitable of men to be a judge in his own cause.

No one is offended at not seeing everything; but one does not like to be mistaken, and that perhaps arises from the fact that man naturally cannot see everything, and that naturally he cannot err in the side he looks at, since the perceptions of our senses are always true.

Those honor nature well, who teach that she can speak on everything...

We like security: we like the pope to be infallible in matters of faith, and grave doctors to be so in moral questions so that we can feel reassured.

Passion cannot be beautiful without excess; one either loves too much or not enough.