"The only good philosophy is that which makes fun of philosophy."

"If our condition were truly happy, we should not need to divert ourselves from thinking about it."

"All men's miseries derive from not being able to sit in a quiet room alone."

"We are nothing but a heap of contradictions."

"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…"