Whether or not you can observe a thing depends upon the…

“It is the theory which decides what can be observed”

— Albert Einstein

It is the theory that decides what can be observed.

— Albert Einstein

It is the theory which decides what we can observe

— Albert Einstein

It is the theory that decides what we can observe.

— Albert Einstein

... on principle, it is quite wrong to try founding a theory on observable magnitudes alone. In reality the very opposite happens. It is…

— Albert Einstein

“You are unaware of your theory-in-use. Part of what makes your theory-in-use so powerful is that it operates quickly, skillfully, and effortlessly.”

— Roger Schwarz

The electron is a theory we use; it is so useful in understanding the way nature works that we can almost call it real.

— Richard P. Feynman

“Although we all have various espoused theories, when we find ourselves in an embarrassing or psychologically threatening situation, almost all of us activate just…

— Roger Schwarz

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

— Chris Argyris

“As Einstein once said, “It is the theory which decides what can be observed.” But I must add that prior to theory there is…

— Vernon L. Smith

Democracy, taken in its narrower, purely political, sense, suffers from the fact that those in economic and political power possess the means for molding…

— Albert Einstein

All we can thus far say about the duration of the units of [the business cycle] and each of [its] two phases is that…

— Joseph A. Schumpeter

The foremost challenge is that of the knowledge revolution. Economic power will depend on creativity and innovation. Creation of wealth will move from traditional…

— Talal Abu-Ghazaleh

Surely to root politics out of art is a highly necessary undertaking: for the freedom of art, like that of science, depends entirely upon…

— Wyndham Lewis

It all depends on you. You can go on sleeping forever, you can wake up right this moment.

— Rajneesh