Success comes from curiosity, concentration, perseverance and self criticism.

I am a determinist. As such, I do not believe in free will...Practically, I am, nevertheless, compelled to act as if freedom of the will existed. If I wish to live in a civilized community, I must act as if man is a responsible being.

The restriction of knowledge to an elite group destroys the spirit of the society and leads to its intellectual impoverishment.

If the facts don't fit the theory, change the facts.

The most powerful force in the world is compound interest.

Human beings, vegetables, or cosmic dust, we all dance to a mysterious tune, intoned in the distance by an invisible piper.

You cannot simultaneously prevent and prepare for war.