"Christianity is a revolt of all creatures that crawl on the ground against everything that is lofty."

"A man who has a 'why' to live, can bear almost any 'how'."

"The visionary is a realist in disguise."

"The man of knowledge must be able not only to love his enemies but also to hate his friends."

"Man's maturity: to have reacquired the seriousness that one had as a child at play."