Harry, Ron, Hermione, Neville, Ginny and Luna go to the Department of Mysteries. They find a prophecy that says "..and the Dark Lord will mark him as equal, but he will have power the Dark Lord knows not... and either must die at the hand of the other for neither can live while the other survives." Harry and his friends fight the Death Eaters and Sirius is killed by Bellatrix Lestrange. Dumbledore and Voldemort battle one another and Voldemort possesses Harry. Harry rejects Voldemort and says that he pities him because he'll never know love and friendship. Minister Fudge and other members of the Ministry of Magic see Voldemort (as he escapes quickly) and they finally know and realize that he's back. The Ministry of Magic admits that Voldemort is back and Dumbledore is re-instated as the Headmaster of Hogwarts. Dumbledore admits to Harry why he has been distant lately: he did it on purpose so that (maybe) Voldemort would be less tempted to get to Harry. Luna Lovegood puts up Wanted flyers at school for her belongings (they were stolen by students as a joke and not by nargles) and she finds her sneakers. Harry, Hermione and Ron leave Hogwarts until next year and Harry mentions that they have on their side something that Voldemort lacks: friendship, love and that those are things worth fighting for.
Syd
Answer: Sure. The whole prophecy, taken from the books, reads as follows: "The one with the power to vanquish the Dark Lord approaches... born to those who have thrice defied him, born as the seventh month dies... and the Dark Lord will mark him as his equal, but he will have power the Dark Lord knows not... and either must die at the hand of the other for neither can live while the other survives... the one with the power to vanquish the Dark Lord will be born as the seventh month dies...". Thus stating that the person who will be able to defeat Voldemort will be born at the end of July, to parents who have escaped Voldemort on three occasions - this applies to Harry, born on July 31st, and also to Neville Longbottom, born the previous day. It states that Voldemort will mark his enemy, which occurs when Harry was a year old, when Voldemort failed to kill him, leaving him with his scar - the deciding event that determined that Harry was the subject of the prophecy. The power "that the Dark Lord has not" is believed to refer to Harry's capacity for love, which Voldemort lacks entirely. Finally, the "neither can live while the other survives" section is fairly straight-forward; only one of the pair will live, the other must die - the interpretation being that one must kill the other.
Tailkinker ★