"Human life is a business that does not pay its expenses."

"A man can do what he wants, but not want what he wants."

"A sense of humour is the only divine quality of man."

"Life is a constant oscillation between the pain of wanting and the boredom of having."

"If children were brought into the world by an act of pure reason alone, would the human race continue to exist? Would not a man rather have so much sympathy with the coming generation as to spare it t…"