Always Quote by Richard P. Feynman

People are always asking for the latest developments in the unification of this theory with that theory, and they don't give us a chance…

— Richard P. Feynman

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

— David Antin

“I have already mentioned two features that successful unifications tend to share. The first, surprise, cannot be underestimated. If there is no surprise, then…

— Lee Smolin

At any one time there is a natural tendency among physicists to believe that we already know the essential ingredients of a comprehensive theory…

— Val Logsdon Fitch

If you ask almost any of them, 'Do you stand behind your theory? Is this the answer?' I think almost everyone would say, 'No,…

— Saul Perlmutter

Something unknown is doing we don't know what-that is what our theory amounts to.

— Arthur Eddington

First... a new theory is attacked as absurd; then it is admitted to be true, but obvious and insignificant; finally it is seen to…

— William James

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

— Massimo Pigliucci

I don't think about a theory of everything when I do my research. And even if we knew the ultimate underlying theory, how are…

— Lisa Randall

I don't believe that the ultimate theory will come by steady work along existing lines. We need something new. We can't predict what that…

— Stephen Hawking

Just because you're starting from something which you know - a theory which you know is right and trying to further develop your understand…

— Peter Woit

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

— Josephine Lawrence