If a line is to be drawn between boys and men, I think it must be 18 years old.... The Catcher in the Rye says this: "Boys willing to die for their greatest dreams, But men will live humblely for a reason. " The mark of the immature man is that he wants to die nobly for a cause, while the mark of the mature man is that he wants to live humbly for one. What a philosophical but contradictory passage~ Because of commitment, immature boys will instantly become men! But how does a man who has lost his dream take on life?