"Happiness does not lie in happiness, but in the achievement of it."

"Pain and suffering are always inevitable for a large intelligence and a deep heart. The really great men of action, for example, must, I believe, have great sadness on earth."

"A man who lies to himself and believes his own lies becomes unable to recognize truth, either in himself or in anyone else, and he ends up losing respect for himself and for others. When he has no res…"

"Man only likes to count his troubles; he doesn't calculate his happiness."

"Man is a mystery. It needs to be unravelled, and if you spend your whole life unravelling it, don't say that you've wasted time. I am studying that mystery because I want to be a human being."