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.

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.

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.

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.

How empty is theory in the presence of fact

How empty is theory in the presence of fact

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.

Many things difficult to design prove easy to performance.

Many things difficult to design prove easy to performance.

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

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

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.