Did you know— then?” asked Harry.
“Did I know that I had just met the most dangerous Dark wizard of all time? No.

I can make things move without touching them. I can make animals do what I want them to do, without training them. I can make bad things happen to people who annoy me. I can make them hurt if I want to.

This diary holds memories of terrible things. Things that were covered up. Things that happened at Hogwarts School of Witchcraft and Wizardry

You are omniscient as ever, Dumbledore."
"Oh, no, merely friendly with the local barmen.

Well, you split your soul, you see, and hide part of it in an object outside the body. Then, even if one’s body is attacked or destroyed, one cannot die, for part of the soul remains earthbound and undamaged. But of course, existence in such a form . . .

Even You-Know-Who can't split himself into seven.