He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never read more

He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.

If the facts don't fit the theory, change the facts.

If the facts don't fit the theory, change the facts.

An ounce of action is worth a ton of theory.

An ounce of action is worth a ton of 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.

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.

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.

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.