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.

Relativity applies to physics, not ethics

Relativity applies to physics, not ethics

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.

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.

Let us work without theorizing, 'Tis the only way to make life endurable.

Let us work without theorizing, 'Tis the only way to make life endurable.

The theory seems to be that as long as a man is a failure he is one of God's children, read more

The theory seems to be that as long as a man is a failure he is one of God's children, but that as soon as he succeeds he is taken over by the Devil.

It is the theory that decides what can be observed

It is the theory that decides what can be observed

There can be no theory of any account unless it corroborate with the theory of the earth.

There can be no theory of any account unless it corroborate with the theory of the earth.