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.

Turn and face the strange.

I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.

Intelligence without ambition is a bird without wings.

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

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

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