A young man without ambition is an old man waiting to be.

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

The young man knows the rules, but the old man knows the exceptions.

It is bad for a young man to sin; but it is worse for an old man to sin.

A young man who isn't a socialist hasn't got a heart; an old man who is a socialist hasn't got a head.

Old man with a young mind is much younger than the young man with an old mind!