Kernel Quote by David Hilbert

[we see that] science is eminently perfectible, and that each theory has constantly to give way to a fresh one.

— Jules Verne

To understand theory is not enough. Much practice is necessary...

— Kimon Nicolaides

Most people don't have time to master the very mathematical details of theoretical physics.

— Stephen Hawking

Theory, from whatever source, is not perfect until it is reduced to practice.

— Hosea Ballou

A scientific theory is a tool and not a creed.

— Joseph John Thomson

Any theory is better than no theory.

— Fuller Albright

“It is impossible to do science in the absence of a pre-existing theory. (p.125)”

— Kathryn Schulz

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

— David Antin

If we do discover a complete theory, it should be in time understandable in broad principle by everyone. Then we shall all, philosophers, scientists,…

— Stephen Hawking

“Theory in any branch of science entails a risk of detachment from reality”

— Quammen, David

[The infinitely small] neither have nor can have theory; it is a dangerous instrument in the hands of beginners [ ... ] anticipating, for…

— Francois-Joseph Servois

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

— Josephine Lawrence