The correct answer is "a Man". Kipling ends his poem with the line "And—which is more—you'll be a Man, my son!" This indicates that Kipling is addressing his poem to youths who are not yet adults (or even immature adults). The speaker is a father-figure that intends to counsel his son about becoming an adult. The first stanza is about knowing oneself. The second is about knowing that we not always get what we want. The thirs is about being brave. The third is about knowing one's place in the world.