"Reason's last step is to recognize that there are an infinite number of things which are beyond it."

"The only good thing in life is to be happy."

"We are generally more persuaded by the reasons we have ourselves discovered than by those which have been discovered by others."

"What is the 'I'? A man at a window sees the passers-by; if I pass by, can I say that he saw me? No; for he did not think of me in particular. But if he loves someone, and I am that someone, then he lo…"

"The strength of a man's virtue should not be measured by his special efforts, but by his ordinary doing."