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

Be as you wish to seem.

The more I see, the less I know for sure.

Wisdom is the daughter of experience.

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

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

There are two things a person should never be angry at, what they can help, and what they cannot.

Where there is shouting, there is no true knowledge.

Those who know do not speak, those who speak do not know.