Arthur Weasley: When you stopped You-Know-Who... Black lost everything. But to this day, he still remains a faithful servant. And in his mind... you are the only thing that stands in the way... of You-Know-Who returning to power. And that is why... he has escaped from Azkaban. To find you.

Harry Potter: And kill me.

Arthur Weasley: Harry, swear to me that whatever you might hear... you won't go looking for Black.

Harry Potter: Mr. Weasley... why would I go looking for someone who wants to kill me?