This chapter's epigraph is from a famous poem by the English poet William Butler Yeats. It's a quote from a poem in which the poet states that he wishes he were a wizard so that he could kill the "weak wizard" . In other words, the poem says that he wants to kill the weak wizard in order to get revenge on him. The poem also says that if he were an angel, he would kill a weak wizard for the sake of his own honor. This is a pretty bold statement, but it's also true. The poet says that angels don't get carried away with their emotions, and that they never start plotting against their own kind. They're not like the "wizards" who are driven by their lowly emotions. The only problem, the poet says, is that he's been pushing the wizard too hard, and now he needs to keep his distance from him. He doesn't want to drive him away, he just wants to stop him from getting too close to the girl. He's not joking with the girl, he says, because he knows that people will gossip about him if he flirts too much with her. He says that it was his fault that he ended up breaking the man's heart, and he apologizes to him for breaking his heart. But the poet still thinks that the man shouldn't apologize to the man, because it would be pointless to regret it. He suggests that the only thing to do is to use a "disposable doom-proofing spray" , which is a kind of "doom-proofing" spray that's meant only for humans affected by "wizard'