Even if Voldemort manages to possess Harry, you don't have to kill Harry just to kill Voldemort.  Accordingly, you reestablish contact with Harry, which makes his anger with you and the rest of the world gradually subside, and you successfully teach Harry how to block Voldemort out of his mind.

  In fact, Voldemort was planning to use his link with Harry to Harry's detriment.  As you recall, he heard only part of Trelawney's prophecy, and he is most anxious to hear the rest of it.  A record of each of the prophecies that has ever been made is guarded deep within the Ministry of Magic.  Only those who are mentioned in the prophecy are allowed to take it; anybody else doing so will be driven insane, as Voldemort discovers when it happens to a Ministry worker who tries it under the influence of an Imperius Curse cast by Lucius Malfoy.  Voldemort knows that Harry is mentioned in the prophecy; so he plans to get Harry to take it, and then have some of his Death Eaters force Harry to give it to them.  Accordingly, he has been using his link with Harry to instruct him how to get to the prophecy.  When he thinks the time is ripe, he orders Lucius to lead a team of Death Eaters to a hiding place near the prophecy and then sends a message to Harry that he has captured Sirius Black and is torturing him to take the prophecy, after which he will kill him.  Harry is supposed to come to rescue Sirius, after which the Death Eaters will carry out the rest of the plan.

  But Harry, armed with the power of Occlumency, never gets the message.  When Voldemort appears and learns that his plan has failed, he flies into one of his uncontrollable rages and kills Lucius.  The other Death Eaters now realize that no matter how loyal they are to Voldemort, they are not safe from his wrath; so they abandon him en masse, all except for Bellatrix Lestrange.  She alone among the Death Eaters acted not out of fear or power-lust or the promise of personal gain but out of love for Voldemort.  Unable to persuade any of the other Death Eaters to stay, she sacrifices herself for him: she picks up the prophecy, tosses it to him and is driven insane, which in her case is more of a putt than a drive.  From the prophecy, Voldemort learns that he has given Harry the power to defeat him.  He now realizes that Harry, armed with this power and surrounded by friends, is too powerful for him to defeat unless he can once again surround himself with followers.  Accordingly, he leads Bellatrix home, intending to nurse her back to health and use her as a nucleus around which to rebuild a support group.

  Turn to Chapter 35.