Easier said than done, Harry sought. He looked over the graveyard at the foot of the hill, trying to sort through his reasons to find the one Hermione could understand. "Because it feels right," would not fly with her. "Because of my parents," he admitted, finally. "After everything they told me, I feel like ... I don't think they want me to become a murderer. Quirrell was self-defence, but killing Voldemort in cold blood, hunting down the pieces of his soul so that I can cut the final tether ... that's predetermined murder. I tried, Hermione, please, believe me! I just ... I can't do that."