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

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

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.

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

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.

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.

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