Harry Potter:
[after looking at Slughorn's memory of Tom Riddle in the Pensieve, sees Dumbledore]
Sir...
[Dumbledore holds his hand out then slows turns away and sits on the step with shock in his face]
Albus Dumbledore:
This is beyond anything I imagined.
Harry Potter:
You mean to say he succeeded, sir, in making a Horcrux?
Albus Dumbledore:
Oh, yes, he succeeded, all right, and not just once.
Harry Potter:
What are they, exactly?
Albus Dumbledore:
Could be anything. Most commonplace in objects.
[Dumbledore goes to his desk and pulls out a couple objects]
Albus Dumbledore:
A ring, for example, or a book.
Harry Potter:
[recognizes it]
Tom Riddle's diary.
Albus Dumbledore:
It's a Horcrux, yes. Four years ago, when you saved Ginny Weasley's life in the Chamber of Secrets, you brought me this. I knew then this was a different kind of magic; very dark, very powerful. But until tonight, I had no idea just how powerful.
Harry Potter:
And the ring?
Albus Dumbledore:
Belonged to Voldemort's mother. Difficult to find--even more difficult to destroy.
[shows Harry his own blackened hand]
Harry Potter:
But if you could find them all, if you did destroy each Horcrux...
Albus Dumbledore:
One destroys Voldemort.
Harry Potter:
But how would you find them? They could be hidden anywhere.
Albus Dumbledore:
True, but magic, especially dark magic...
[Harry touches the ring, which spins quickly by itself until it stops]
Albus Dumbledore:
...leaves traces.
Harry Potter:
[after a long pause]
It's where you've been going, isn't it, sir? When you leave the school?
Harry Potter:
Yes. And I think perhaps I may have found another. But this time, I cannot hope to destroy it alone. Once again... I ask too much of you, Harry.