Albert Einstein

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

The important thing is not to stop questioning. Curiosity has its own reason for existing.

I never think of the future - it comes soon enough.

Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.

I speak to everyone in the same way, whether he is the garbage man or the president of the university.

Out of clutter, find simplicity.

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

Reality is merely an illusion, albeit a very persistent one.

The secret to creativity is knowing how to hide your sources.

Solitude [...] is painful in youth, but delicious in the years of maturity.

The only real valuable thing is intuition.

No amount of experimentation can ever prove me right; a single experiment can prove me wrong.

Peace cannot be kept by force; it can only be achieved by understanding.

Since the mathematicians have invaded the theory of relativity I do not understand it myself any more.

Man usually avoids attributing cleverness to somebody else. Unless it`s an enemy.