Let us work without theorizing, 'Tis the only way to make life endurable.

Let us work without theorizing, 'Tis the only way to make life endurable.

It is the theory that decides what can be observed

It is the theory that decides what can be observed

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.

Relativity applies to physics, not ethics

Relativity applies to physics, not ethics

Life is so unlike theory.

Life is so unlike theory.

How empty is theory in the presence of fact

How empty is theory in the presence of fact

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

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

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.

Many things difficult to design prove easy to performance.

Many things difficult to design prove easy to performance.