Can not Quote by Albert Einstein

If a theory purports to explain everything, then it is likely not explaining much at all.

— Massimo Pigliucci

A theory should not attempt to explain all the facts, because some of the facts are wrong

— Francis Crick

Never abandon a theory that explains something until you have a theory that explains more.

— John McCarthy

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

— Josephine Lawrence

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

— Jean-Martin Charcot

Any theory is better than no theory.

— Fuller Albright

The strength of a theory is not what it allows, but what it prohibits; if you can invent an equally persuasive explanation for any…

— Eliezer Yudkowsky

Theory is worth but little, unless it can explain its own phenomena, and it must effect this without contradicting itself; therefore, the facts are…

— Charles Caleb Colton

That theory is worthless. It isn't even wrong!

— Wolfgang Pauli

Some theories are good for nothing except to be argued about.

— Georg C. Lichtenberg

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

— Noam Chomsky

I'm not sure what theory is, unless it's the pursuit of fundamental questions.

— David Antin