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.

Intelligence is the ability to adapt to change.

Do not judge me by my successes, judge me by how many times I fell down and got back up again.

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.

I have never let my schooling interfere with my education.

Those who cannot change their minds cannot change anything.

No matter what people tell you, words and ideas can change the world.