A theory is no more like a fact than a photograph is like a person.

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

A man will do more for his stubbornness than for his religion or his country.

A good scare is worth more to a man than good advice.

It is hard to convince a high-school student that he will encounter a lot of problems more difficult than those of algebra and geometry.

The modest person is usually admired, if people ever hear of them.