If I had an hour to solve a problem I'd spend 55 minutes thinking about the problem and 5 minutes thinking about solutions.

On the left-hand side of the field equation we may add the fundamental tensor guv, multiplied by a universal constant, -λ, at present unknown, without destroying the general covariance.

It was the experience of mystery - even if mixed with fear - that engendered religion.

I am not a Jew in the sense that I would demand the preservation of the Jewish or any other nationality as an end in itself. Rather, I see Jewish nationality as a fact and I believe that every Jew must draw the consequences from this fact.

The world we have created is a product of our thinking.

Anyone can be a genius, if they pick just one specific subject and study it diligently just 15 minutes each day.

Out of the clutter find Simplicity