(Believe)
He hadn't even wanted to start the D.A. in the first place. Not that he didn't want to, you know, help people, but, well, who would want to be taught anything from a guy everyone thought was a nutter?
At the Hogshead first meeting, he was rather pleasantly surprised.
But really, how could he, a 15 year old, who had a rather good knack of getting into trouble, be able to teach a group of students-some older than him- how to defend themselves?
Or how to keep themselves alive?
Really, he found it was quite simple.
And he found himself with confidence, for himself, and for everyone in the D.A.- even Neville.
(In the course of this year, Harry learned how to believe.)