If the facts don't fit the theory, change the facts.

If the facts don't fit the theory, change the facts.

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.

Many things difficult to design prove easy to performance.

Many things difficult to design prove easy to performance.

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.

It is the theory that decides what can be observed

It is the theory that decides what can be observed

You have to know you can first. How comes later.

You have to know you can first. How comes later.

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.

Whenever a theory appears to you as the only possible one, take this as a sign that you have neither read more

Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve

In theory there is no difference between theory and practice. In practice there is.

In theory there is no difference between theory and practice. In practice there is.