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

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

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.

Death may be the greatest of all human blessings.

If you tell the truth, you don't have to remember anything.

We may have all come on different ships, but we’re in the same boat now.