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.

Everything you can imagine is real.

I am not an Athenian or a Greek, but a citizen of the world.

My brain is only a receiver, in the Universe there is a core from which we obtain knowledge, strength and inspiration. I have not penetrated into the secrets of this core, but I know that it exists.

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

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

Once we accept our limits, we go beyond them.

Why does the eye see a thing more clearly in dreams than the imagination when awake?