Harry's mind is racing about Malfoy and Snape, and he can't help but tell everyone about what he has learned and about his suspicions.
Mr. Weasley tells Harry that Snape was probably just pretending to be on Voldemort's side so that he could discover more about what Draco is up to.
Remus Lupin tells Harry to drop it: if Dumbledore trusts Snape, then so should they.
Harry wonders how Lupin could not hold a grudge against Snape, considering Snape exposed Lupin's werewolf side which got Lupin fired from Hogwarts.
Lupin responds that, in spite of this, Snape also made him a Wolfsbane potion every month so that Lupin would not have to suffer under the full moon.
Lupin tells Harry about Fenrir Greyback, the leader of the werewolves and a vicious being. Fenrir likes to bite children so that they grow up to be werewolves. Fenrir is responsible for Lupin's becoming a werewolf, having bitten him when Lupin was just a child. Fenrir is allies with Voldemort.
Lately, Lupin has been living with werewolves in order to better spy on their actions, and hopefully convince some of them to side with Dumbledore.
Soon after, Percy Weasley and Scrimgeour, the Minister of Magic, make a special visit to the Burrow while the family is in the middle of dinner.
Mrs. Weasley, who hasn't seen Percy in a long time, is beside herself with joy that he has finally come home.
But Percy doesn't seem too happy to see his family.
We come to find out that the real purpose of Percy and Scrimgeour's visit is to give the Minister a chance to speak with Harry Potter alone.
Outside in the garden, Scrimgeour plies Harry with lots of questions about the prophecy, whether or not he is the Chosen One, and about the things Dumbledore has told Harry.
Harry doesn't like this and avoids answering Scrimgeour's prying questions in detail.
Scrimgeour gets to the point of his interrogation – he is hoping that Harry will become a kind of ally of the Ministry of Magic. He believes that if the public knows that Harry Potter supports the Ministry, they will too.
Harry doesn't like what the Minister is getting at. He feels like he's being manipulated and used.
The Minister then tries to win Harry over by promising to help him become an Auror – another proposal Harry finds manipulative.
Harry tells the Minister he doesn't want anything to do with a government that arrests people just for the sake of giving the appearance that they are making progress in the war.
The Minister accuses Harry of being "Dumbledore's man through and through" (17.83), to which Harry replies, "Yeah, I am" (17.84).