Intelligence is the ability to adapt to change.

Action is the foundational key to all success.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

The future depends on what you do today.

People who boast about their I.Q. are losers.

Be not afraid of growing slowly, be afraid only of standing still.

My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.

Do what you can, with what you have, where you are.

The man who does not read has no advantage over the man who cannot read.