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.

Reality leaves a lot to the imagination.

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.

Only a life lived for others is a life worthwhile.

Things are only as black as they seem.