A permanent state of transition is man's most notable condition.

Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.

You write in order to change the world…the world changes according to the way people see it, and if you alter, even but a millimetre the way people look at reality, then you change it.

Maturity is the ability to live in peace with that which we cannot change.

The greatest revolution of our generation is the discovery that human beings, by changing the inner attitudes of their minds, can change the outer aspects of their lives.

It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change.