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

Think good, and good follows. Think evil, and evil follows. You are what you think all day long.

I am not an Athenian or a Greek, but a citizen of the world.

A man is but the product of his thoughts. What he thinks he becomes.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

Turn and face the strange.

The future depends on what you do today.

Happiness is when what you think, what you say, and what you do are in harmony.

Those who cannot change their minds cannot change anything.