God is a scientist, not a magician.

I do not believe that a moral philosophy can ever be founded on a scientific basis. … The valuation of life and all its nobler expressions can only come out of the soul’s yearning toward its own destiny. Every attempt to reduce ethics to scientific formulas must fail. Of that I am perfectly convinced.

Anyone who thinks science is trying to make human life easier or more pleasant is utterly mistaken.

Chess holds its master in its own bonds, shackling the mind and brain so that the inner freedom of the very strongest must suffer.

Where the world ceases to be the scene of our personal hopes and wishes, where we face it as free beings admiring, asking and observing, there we enter the realm of Art and Science.

Man, surrounded by facts, permitting himself no surprise, no intuitive flash, no great hypothesis, no risk, is in a locked cell. Ignorance cannot seal the mind and imagination more securely.

The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it.