An expert is a man who has made all the mistakes which can be made, in a narrow field.

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.

Oh what idiots we have all been, this is just as it must be

When it comes to atoms, language can be used only as in poetry.

There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.

When searching for harmony in life one must never forget that in the drama of existence we are ourselves both actors and spectators.

Accuracy and clarity of statement are mutually exclusive.