Have to? Of course you have to! But only because of you, Harry, won't rest until Voldemort is finished! Think now, for once, if you have never heard of the prophecy! What would you do?

Knocking the shrieking goblins aside like skittles

Lord Voldermort Has Risen Again.

And then he greeted Death as an old friend, and went with him gladly, and, equals, they departed this life.

Neither can live while the other survives, and one of us is about to leave for good.

I'm dying!" Malfoy yelled, as the class panicked. "I'm dying, look at me! It's killed me!

Their reward for enduring the awful experience was the right to tell people about it.