Existence Quote by Irving Adler

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

— James Jeans

“A good example of the archetypal ideas which the archetypes produce are natural numbers or integers. With the aid of the integers the shaping…

— K. V. Laurikainen

The Theory of Groups is a branch of mathematics in which one does something to something and then compares the result with the result…

— Anonymous

To come very near to a true theory, and to grasp its precise application, are two different things, as the history of science teaches…

— Alfred North Whitehead

A theory is a good theory if it satisfies two requirements: it must accurately describe a large class of observations on the basis of…

— Stephen Hawking

Einstein's gravitational theory, which is said to be the greatest single achievement of theoretical physics, resulted in beautiful relations connecting gravitational phenomena with the…

— Richard P. Feynman

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

Experimentally, we now have demonstrated that Einstein's theory is right in strong gravitational fields. That's important to a lot of people.

— Rainer Weiss

If we have a correct theory but merely prate about it, pigeonhole it and do not put it into practice, then that theory, however…

— Mao Zedong

Don't confuse hypothesis and theory. The former is a possible explanation; the latter, the correct one. The establishment of theory is the very purpose…

— Martin H. Fischer

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

— Richard P. Feynman

Theory helps us to bear our ignorance of facts.

— George Santayana