My feeling is religious insofar as I am imbued with the consciousness of the insufficiency of the human mind to understand more deeply the harmony of the Universe which we try to formulate as "laws of nature".

Men marry women with the hope they will never change. Women marry men with the hope they will change. Invariably they are both disappointed.

A theory is something nobody believes, except the person who made it. An experiment is something everybody believes, except the person who made it.

The only justification for our concepts and systems of concepts is that they serve to represent the complex of our experiences; beyond this they have not legitimacy.

What we don't know is much more than what we know.

Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand.

In my relativity theory I set up a clock at every point in space, but in reality I find it difficult to provide even one clock in my room.