| Quote #7
Did he realize he was facing twelve years in Azkaban, twelve years that would make him unrecognizable?
It's interesting that Harry feels some compassion at first for the happy young man in the picture, before remembering what he heard about how Black is holding up freakishly well in prison. Harry concludes that Black isn't being punished enough since Harry is still suffering.
| Quote #8
"Don't be silly," said Hermione, in a panicky voice. "Harry doesn't want to kill anyone, do you, Harry?"
Harry definitely has to deal with a major moral dilemma after learning what he thinks is the truth about Black. Should he avenge his parents' death or not? Though the answer to that is definitely no (or this book series would have taken a very odd turn), but reaching that conclusion is a definite struggle for Harry. See the scene where he freezes when trying to kill Sirius.
| Quote #9
He had forgotten about magic – he had forgotten that he was short and skinny and thirteen, whereas Black was a tall, full-grown man – all Harry could think was that he wanted to hurt Black as badly as he could and that he didn't care how much he got hurt in return –. (17.88)
It's fitting that this scene, in which Harry is consumed by anger, focuses so much on forgetting. His entire world has boiled down to the desire to hurt Black.