A theory is no more like a fact than a photograph is like a person.

A theory is no more like a fact than a photograph is like a person.

An ounce of action is worth a ton of theory.

An ounce of action is worth a ton of theory.

There is a theory which states that if ever for any reason anyone discovers what exactly the Universe is for read more

There is a theory which states that if ever for any reason anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.

Relativity applies to physics, not ethics

Relativity applies to physics, not ethics

Many things difficult to design prove easy to performance.

Many things difficult to design prove easy to performance.

I never once made a discovery ... I speak without exaggeration that I have constructed three thousand different theories in read more

I never once made a discovery ... I speak without exaggeration that I have constructed three thousand different theories in connection with the electric light ... Yet in only two cases did my experiments prove the truth of my theory.

Life is so unlike theory.

Life is so unlike theory.

There can be no theory of any account unless it corroborate with the theory of the earth.

There can be no theory of any account unless it corroborate with the theory of the earth.

You cannot run a business, or anything else, on a theory.

You cannot run a business, or anything else, on a theory.