"I am accustomed to sleep, and in my dreams to imagine the same things that lunatics do when awake."

"It is true that when I consider how many different beliefs there are among men, I find no reason to choose one rather than another."

"The chief cause of human error is the confused nature of our perceptions."

"The light of natural reason is sufficient to give us a clear and distinct conception of God."

"I confess that I have never found in my experience that anything which I once clearly understood could afterwards be called into doubt by me."