Abstract Quote by David Bohm

Well-established theories collapse under the weight of new facts and observations which cannot be explained, and then accumulate to the point where the once…

— Al Gore

Creating a new theory is not like destroying an old barn and erecting a skyscraper in its place. It is rather like climbing a…

— Albert Einstein

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

Theory must mediate between all previous truths and certain new experiences

— William James

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

— Jules Verne

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

Theory is continually the precursor of truth; we must pass through the twilight and its shade, to arrive at the full and perfect day.

— Anonymous

Creating a new theory is not like destroying an old barn and erecting a skyscraper in its place. It is rather like climbing a…

— Albert Einstein

Each new ontological theory, propounded in lieu of previous ones shown to be untenable, has been followed by a new criticism leading to a…

— Herbert Spencer

“That' the thing about theories. You can theorize all you want, but at the end of the day when you theories become reality, when…

— Jane Green

Even if there is only one possible unified theory, it is just a set of rules and equations. What is it that breathes fire…

— Stephen Hawking

A theory must be tempered with reality.

— Jawaharlal Nehru