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

I never think of the future. It comes soon enough.

One may say the eternal mystery of the world is its comprehensibility.

I believe that a simple and unassuming manner of life is best for everyone, best both for the body and the mind.

God always takes the simplest way.

Once we accept our limits, we go beyond them.

I have no special talent. I am only passionately curious.

Try not to become a man of success, but rather try to become a man of value.

We cannot solve our problems with the same thinking we used when we created them.