Fatherly advice

When I was leaving home to join the army my father said to me: "Son, You can fool some of the people all of the time. And, you can fool all of the people some of the time. But, you can't fool some of the So I said "Get it right Dad."
He said "I know Son, what i meant was, you can't fool all of the people some of the time."
So I said Dad! get it right!" and he said "Ah fcuk off, you were adopted anyway!"
arrse