Able Quote by Richard P. Feynman

If you claim to have a theory that deduces unexpected consequences from nontrivial principles, let's see it.

— Noam Chomsky

It must be conceded that a theory has an important advantage if its basic concepts and fundamental hypotheses are 'close to experience,' and greater…

— Albert Einstein

You can never tell what will happen to a theory before you can get around to using it.

— Josephine Lawrence

Any theory is better than no theory.

— Fuller Albright

We may as well cut out group theory. That is a subject that will never be of any use in physics.

— James Jeans

Theory is good; but it doesn't prevent things from existing.

— Jean-Martin Charcot

A theory is scientific only if it can be disproved. But the moment you try to cover absolutely everything the chances are that you…

— Hermann Bondi

I never read theory. I think that was to my benefit.

— Nan Goldin

But actually theory is very practical. Gravity is a theory, for example. It allows you to predict that if you step off a cliff…

— Clayton Christensen

You know very well that unless you're a scientist, it's much more important for a theory to be shapely, than for it to be…

— Christopher Hampton

Theory looks well on paper, but does not amount to anything without practice.

— Josh Billings

There is nothing so practical as a good theory.

— Kurt Lewin