Logic will get you from A to Z, imagination will get you everywhere.

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

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

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.

Reality is merely an illusion.

Only a life lived for others is a life worthwhile.