"God wants a child's heart and a grownup's head."

"If nothing in this world satisfies me, perhaps it is because I was made for another world."

"Friendship is born at the moment when one man says to another "What! You too? I thought that no one but myself."

"Friendship is unnecessary, like philosophy, like art. It has no survival value; rather it is one of those things which give value to survival."

"Don't let your happiness depend on something you may lose."

"If we find ourselves with a desire that nothing in this world can satisfy, the most probable explanation is that we were made for another world."