An ounce of action is worth a ton of theory.

An ounce of action is worth a ton of theory.

Relativity applies to physics, not ethics

Relativity applies to physics, not ethics

The theory seems to be that as long as a man is a failure he is one of God's children, read more

The theory seems to be that as long as a man is a failure he is one of God's children, but that as soon as he succeeds he is taken over by the Devil.

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.

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

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

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

A young boy is a theory, an old man is a fact.

A young boy is a theory, an old man is a fact.

It is the theory that decides what can be observed

It is the theory that decides what can be observed

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.