All right," Harry said coldly. "I'll answer your original question, then. You asked why Dark Wizards are afraid of death. Pretend, Headmaster, that you really believed in souls. Pretend that anyone could verify the existence of souls at any time, pretend that nobody cried at funerals because they knew their loved ones were still alive. Now can you imagine destroying a soul? Ripping it to shreds so that nothing remains to go on its next great adventure? Can you imagine what a terrible thing that would be, the worst crime that had ever been committed in the history of the universe, which you would do anything to prevent from happening even once? Because that's what Death really is - the annihilation of a soul!
Eliezer Yudkowsky, Harry Potter and the Methods of Rationality
atheism, rationality