Existence Quote by Arthur Keith

“Our best theories of people, presented on their own terms and without reference to underlying particles and forces, leave plenty of room for human…

— Sean Carroll

One must treat theory-in-use as both a psychological certainty and an intellectual hypothesis.

— Chris Argyris

Anthropology has reached that point of development where the careful investigation of facts shakes our firm belief in the far-reaching theories that have been…

— Franz Boas

With theory, we can separate fundamental characteristics from fascinating idiosyncrasies and incidental features. Theory supplies landmarks and guideposts, and we begin to know what…

— John Henry Holland

The best theory is inspired by practice.

— Donald Knuth

Our theories are the weakest part of what we say. What we're working from is the fact of an experience which we need to…

— Terence McKenna

“Explanations exist; they have existed for all time; there is always a well-known solution to every human problem—neat, plausible, and wrong.”

— H.L. Mencken

“Everyone has a theory of human nature. Everyone has to anticipate the behavior of others, and that means we all need theories about what…

— Steven Pinker

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

Theoretical approaches have their place and are, I suppose, essential but a theory must be tempered with reality.

— Jawaharlal Nehru

“Theory becomes realized among a people only in so far as it represents the realization of that people's needs.”

— Karl Marx

Theory is needed to tell you where to look.

— Marcus du Sautoy