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.

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 cannot run a business, or anything else, on a theory.

You cannot run a business, or anything else, on a theory.

How empty is theory in the presence of fact

How empty is theory in the presence of fact

In scientific work, those who refuse to go beyond fact rarely get as far as fact.

In scientific work, those who refuse to go beyond fact rarely get as far as fact.

Relativity applies to physics, not ethics

Relativity applies to physics, not ethics

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.

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.