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

The future depends on what you do today.

People won't have time for you if you are always angry or complaining.

What one does is what counts. Not what one had the intention of doing.

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.

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

Either write something worth reading or do something worth writing.