It seems as though every time you learn something new you have to give up something.

A man learns to skate by staggering about and making a fool of himself. Indeed he progresses in all things by resolutely making a fool of himself.

Self-sacrifice enables us to sacrifice other people without blushing.

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

What is the matter with the rich is Uselessness.

The man who has never made a mistake will never make anything else.

All evolution in thought and conduct must at first appear as heresy and misconduct.