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.

One who scorns the power of intuition will never rise above the ranks of journeyman calculator.

I do not believe that civilization will be wiped out in a war fought with the atomic bomb. Perhaps two-thirds of the people of the earth will be killed.

If I could remember the names of all these particles, I'd be a botanist.

The importance of a problem should not be judged by the number of pages devoted to it.

Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.

What really interests me is whether God had any choice in the creation of the World.