When I am judging a theory, I ask myself whether, if I were God, I would have arranged the world in such a way.

I want to know God's thoughts... the rest are details

Since the mathematicians have invaded the theory of relativity, I do not understand it myself anymore.

Thus the partial differential equation entered theoretical physics as a handmaid, but has gradually become mistress.

I like to think that the moon is there even if I am not looking at it

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.