The secret of change is to focus all of your energy, not on fighting the old, but on building the new.

Be the change that you wish to see in the world.

Life would be tragic if it weren't funny.

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

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

You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete.

Intelligence without ambition is a bird without wings.

If you think we can't change the world, it just means you're not one of those what will.

We should seek the greatest value of our action.