"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…"

"If a man wants to be happy, let him remain unmarried."

"The greatest wisdom is to make the present the object of one's consciousness, so that one is always in the present."

"The chief source of man's unhappiness is that he does not know how to stay quietly in his room."

"The State in its essence is merely an institution existing for the purpose of protecting its members against outward attack or inward dissension. It follows from this that the ultimate ground on which…"