As you know, a theory in physics is not useful unless it is able to predict underlined effects which we would otherwise expect.

Physicists like to think that all you have to do is say, these are the conditions, now what happens next?

Everybody who reasons carefully about anything is making a contribution ... and if you abstract it away and send it to the Department of Mathematics they put it in books.

I think a power to do something is of value. Whether the result is a good thing or a bad thing depends on how it is used, but the power is a value.

We can deduce, often, from one part of physics like the law of gravitation, a principle which turns out to be much more valid than the derivation.

Don't pay attention to "authorities," think for yourself.

No one really understands quantum mechanics.