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

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

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.

An ounce of action is worth a ton of theory.

An ounce of action is worth a ton of theory.

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.

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.

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

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

There is a theory which states that if ever for any reason anyone discovers what exactly the Universe is for read more

There is a theory which states that if ever for any reason anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.

A purpose, an intention, a design, strikes everywhere the careless, the most stupid thinker

A purpose, an intention, a design, strikes everywhere the careless, the most stupid thinker

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