There is only one good, knowledge, and one evil, ignorance.

Ignorance, the root and stem of all evil.

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

Life would be tragic if it weren't funny.

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

I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.

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

We should seek the greatest value of our action.