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

Life would be tragic if it weren't funny.

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

Turn and face the strange.

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.

Education is the most powerful weapon which you can use to change the world.

Those who cannot change their minds cannot change anything.

We should seek the greatest value of our action.