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

Science is organized common sense where many a beautiful theory was killed by an ugly fact.

Science is organized common sense where many a beautiful theory was killed by an ugly fact.

How empty is theory in the presence of fact

How empty is theory in the presence of fact

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.

He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never read more

He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.

Relativity applies to physics, not ethics

Relativity applies to physics, not ethics

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

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

A theory has only the alternative of being right or wrong. A model has a third possibility - it may read more

A theory has only the alternative of being right or wrong. A model has a third possibility - it may be right but irrelevant.