An ounce of action is worth a ton of theory.

An ounce of action is worth a ton of theory.

You have to know you can first. How comes later.

You have to know you can first. How comes later.

In theory there is no difference between theory and practice. In practice there is.

In theory there is no difference between theory and practice. In practice there is.

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.

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

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

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.

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.

Our theories of the eternal are as valuable as are those which a chick which has not broken its way read more

Our theories of the eternal are as valuable as are those which a chick which has not broken its way through its shell might form of the outside world.

It is the theory that decides what can be observed

It is the theory that decides what can be observed