"Yes," said Harry. He hesitated, and then the question he had to ask burst from him before he could stop himself. "Why? Why do they affect me like that? Am I just --?"

"It has nothing to do with weakness," said Professor Lupin sharply, as though he had read Harry's mind. "The Dementors affect you worse than the others because there are horrors in your past that the others don't have. "

Chapter 10