The only true wisdom is in knowing you know nothing.

There is only one good, knowledge, and one evil, ignorance.

Time stays long enough for anyone who will use it.

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

Art is never finished, only abandoned.

Realize that everything connects to everything else.

I have been impressed with the urgency of doing. Knowing is not enough, we must apply. Being willing is not enough, we must do.

If you can't explain it to a six year old, you don't understand it yourself.

The noblest pleasure is the joy of understanding.