The only true wisdom is in knowing you know nothing.

Life is like riding a bicycle. To keep your balance, you must keep moving.

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

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

Where there is shouting, there is no true knowledge.

A clever person solves a problem. A wise person avoids it.

The most important knowledge is that which guides the way you lead your life.

I have no special talents. I am only passionately curious.

Once we accept our limits, we go beyond them.