The opposite of a fact is falsehood, but the opposite of one profound truth may very well be another profound truth.

A person who wasn't outraged on first hearing about quantum theory didn't understand what had been said.

Rutherford is a man you can rely on; he comes regularly and enquires how things are going and talks about the smallest details - Rutherford is such an outstanding man and really interested in the work of all the people around him.

The measurement we get when we measure something is not a property of the thing measured.

Some things are so serious, they can only be joked about.

Sometimes the child in one behaves a certain way and the rest of oneself follows behind, slowly shaking its head.

Of course I don't believe in it [pointing to horseshoe on his office wall]. But I understand that it brings you luck whether you believe in it or not.