"Voldemort has still not found a solution to his weakness due to the ritual to return him to his body being performed incorrectly. As of now that is our greatest advantage over him, and we must do whatever necessary in order to maintain it." Dumbledore explained. "When Severus explained to Voldemort that the only way he knew of to restore his strength was to perform the ritual again Voldemort told the Death Eater's that their top priority was to capture you. He seems to believe that your blood is the key.
"Why? It was Wormtail's part of the ritual that was wrong. Not my blood." Harry pointed out.
"True, but Voldemort has apparently experimented extensively on Wormtail and decided his flesh does not hold the secret to correcting the ritual." Dumbledore answered. "I believed then, as I do now, that we must prevent Voldemort from capturing you at all costs. I fear that if he does somehow get to you he could kill you and increase his strength in one fell swoop. If that happens, and the prophecy holds true, our world could be plunged into a darkness from which it may never recover. You are safest living with your relatives, despite the animosity between you."
"I disagree, though I understand why you think that." Harry replied. "But what I don't get is why you decided to try and trap me there without even discussing it with me first."
"It was, perhaps, a mistake on my part. However I knew you would never agree to such a request." Dumbledore said as Harry nodded in agreement with the statement. "You must survive Harry, not only for your own sake but for that of the entire world."
"The prophecy again? You know, I'm not sure I even believe in it." Harry commented.
"I do. And Voldemort does as well." Dumbledore pointed out. "He will keep coming for you, there is no doubt of that. We can better oppose him working together, not separately as you and Sirius seem to be doing."
"And what do you mean by that?" Harry asked.
"I am no fool, Harry. I know that you have destroyed the Horcruxes contained in Ravenclaw's Diadem and the one in Marvolo Gaunt's ring. I did not attempt to prevent you from doing so."
"Why didn't you help me then?" Harry said, surprised that Dumbledore knew. "What have you been doing to get rid of the Horcruxes?"
"Nothing, as I suspect it must be." Dumbledore answered. "According to the prophecy it is your task to vanquish the Dark Lord. I find it hard to believe that it was a mere coincidence that you destroyed the Horcrux in Tom Riddle's diary and were able to gain extensive knowledge on all of Voldemorts Horcruxes if this task were not up to you. And since then you have destroyed two more, further evidence that this point of view is correct."
"But you can't know that!" Harry replied. "No one else has tried to get rid of one yet. It could be just one big coincidence."
"Perhaps, but I still so no reason to stand in your way. That day at the Gaunt's old house, I was there watching you and Sirius." Dumbledore said, prompting a look of surprise from Harry. "Yes, I suspected you did not know that. If I felt that either of you were in any danger I could have arrived in a few short moments. But in the end you did not require my help, and I commend you for your efforts."
"There are still other Horcruxes out there." Harry pointed out. "Are you going to help me or not?"
"If you wish." Dumbledore said with a nod. "Now, are you going to tell me what it is you and Sirius are up to? I will find out even if you don't tell me." Harry looked a little angry at that comment, but knew Dumbledore was right.
"We want to attack the Dementors while they're still at Azkaban." Harry said. "Most witches and wizards don't even know how to cast a Patronus meaning there is not much they can do to fight one off. But we can kill them. Just think of how many lives we could save if we acted now and didn't just sit around waiting for them to attack."
"The idea has merit." Dumbledore agreed. "The Dementors are monsters, not men, and I do not oppose destroying them."
"Sirius and I have discussed it quite a bit." Harry replied. "And we realize that this will be hard on the Aurors since they will have to guard the prison now, but the Dementors are going to leave eventually anyway."
"That is likely." Dumbledore said with a small nod.
"We think that with a couple of people who can cast the Dementor killing version of the Patronus and a dozen or so other who can cast a normal one we can trap the Dementors inside Azkaban and destroy them one by one." Harry explained.
"Interesting." Dumbledore replied. "I will consider it."
"And by that do you mean I won't hear anything about it again?"
"No, Harry." Dumbledore answered. "It means I will think about the strengths and weaknesses of th idea and decide what to do from there. I will make my decision within the week. I assume you wish to be a part of the team that would mount the attack?"
"Not many other people can cast a Patronus like mine, so yes." Harry said. "Haven't I proved by now that I can handle myself in dangerous situations?"
"I suppose you have." Dumbledore said. "That brings up another point I wished to discuss with you Harry, I am worried about your reaction to killing Fenrir Greyback and Rabastan Lestrange."
"I'm not sure what you want me to say, Professor." Harry answered with a sigh. "I wish they had never put me in that situation. I wish there wasn't a war going on and that my friends weren't in danger. But they are, and it's their fault. I refuse to mourn the same men who killed Moony and drove Neville's parents insane. They started this, not me."
"I worry that this is not you speaking."
"It is sir." Harry assured him. "My attitude may have changed some, but I still know right from wrong. It is wrong to kill innocents, and that is exactly what they do."
"Very well, but I do hope you will consider that everyone should have the chance to redeem themselves." Dumbledore said. "Sometimes your greatest ally can be someone who was once your greatest enemy."
"I'll think about it." Harry answered, but internally he was thinking how ridiculous it would be to expect Voldemort to repent off his sins and beg forgiveness. "If that's all, I'll be going now."
"Indeed." Dumbledore replied as he stood up from the chair. "I do regret our disagreements Harry, but I believe we can get past them and work together."
Harry nodded at his words and Dumbledore seemed pleased by the response. The professor then walked out of the room and left the house without saying anything else, leaving Harry to wonder what Dumbledore's next move actually would be. He had no idea, but knew that the assualt on Azkaban would be much easier with his help than without it. Plus getting a group of people willing to help out would be much more difficult if Dumbledore was actively opposing the idea. He hated just waiting for Dumbledore's decision, but at the moment there was not much more he could do.