Conjecture as to things useful, is good; but conjecture as to what it would be useless to know, is very read more

Conjecture as to things useful, is good; but conjecture as to what it would be useless to know, is very idle.

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.

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.

It is the theory that decides what can be observed

It is the theory that decides what can be observed

An ounce of action is worth a ton of theory.

An ounce of action is worth a ton of theory.

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

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

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

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.