We used to think that if we knew one, we knew two, because one and one are two. We are finding that we must learn a great deal more about 'and'.

Something unknown is doing we don't know what.

—Sir Arthur Eddington

Not only is the universe stranger than we imagine, it is stranger than we can imagine.

—Sir Arthur Eddington

It is impossible to trap modern physics into predicting anything with perfect determinism because it deals with probabilities from the outset.

—Sir Arthur Eddington

I ask you to look both ways. For the road to a knowledge of the stars leads through the atom; and important knowledge of the atom has been reached through the stars.

—Sir Arthur Eddington

The mathematics is not there till we put it there.

—Sir Arthur Eddington

Proof is the idol before whom the pure mathematician tortures himself.

—Sir Arthur Eddington

I have hardly ever known a mathematician who was capable of reasoning.

—Plato

In mathematics you don't understand things. You just get used to them.

—Johann von Neumann

I went off to college planning to major in math or philosophy—of course, both those ideas are really the same idea.

—Frank Wilczek