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.

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.

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.

Many things difficult to design prove easy to performance.

Many things difficult to design prove easy to performance.

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.

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