The greatest glory in living lies not in never falling, but in rising every time we fall.

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

Intelligence is the ability to adapt to change.

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.

Appearances matter and remember to smile.

When education and resources are available to all without a price tag, there will be no limit to the human potential.

I have never let my schooling interfere with my education.

Everyone thinks of changing the world, but no one thinks of changing himself.