A man who desires to get married should know everything or nothing.

Affection between adults - if they are really adult in mind and not merely grown up children - and creatures so relatively selfish and cruel as children necessarily are without knowing it or meaning it, cannot be called natural.

Every fool believes what his teachers tell him, and calls his credulity science or morality as confidently as his father called it divine revelation.

The unconscious self is the real genius. Your breathing goes wrong the moment your conscious self meddles with it.

I am a sort of collector of religions: and the curious thing is that I find I can believe in them all.

Nobody could stand an eternity of Heaven.

Reading made Don Quixote a gentleman, but believing what he read made him mad.