The most destructive element in the human mind is fear. Fear creates aggressiveness.

The kind of intelligence a genius has is a different sort of intelligence. The thinking of a genius does not proceed logically. It leaps with great ellipses. I…

The only force that can overcome an idea and a faith is another and better idea and faith, positively and fearlessly upheld.

The instinct to worship is hardly less strong than the instinct to eat.