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

Anyone who has never made a mistake has never tried anything new.

Everything you can imagine is real.

Imagine the end desired and feel its reality. Follow it through, and you will get definite results.

Reality leaves a lot to the imagination.

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

Insanity is doing the same thing over and over again and expecting different results.

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

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