"Men never do evil so completely and cheerfully as when they do it from religious conviction."

"We are all born with a thirst for happiness, but we are all born with a thirst for something we cannot find on earth."

"People are generally better persuaded by the reasons which they have themselves discovered than by those which have come into the mind of others."

"The world is full of people who are not going to be happy, but they are going to be happy in their own way."

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