"There is a lesson that you will never be taught in any book that talks about Defense Against the Dark Arts," the professor proclaimed, interrupting the murmur of the students. "If you want to defeat your enemy, learn their weaknesses. What are they searching for? What motivates them? Answer these questions and you will know how to stop them. Never be afraid to step forward." He added with solemnity, "A teacher shouldn't speak to you in this way, but I don't think I'll remain one for much longer. My place is not here. I want to fight, and if I don't, I know I will have wasted my chance. Always give your best, to make sense of your existence."