O Lorde das Trevas só ouviu parte dele, ele queria ouvir o resto.
Snape só ouviu uma parte da profecia, não a coisa toda. O Lorde das Trevas sabia disso e queria ouvir a coisa toda, caso ele perdesse alguma informação crucial.
“My – our – one stroke of good fortune was that the eavesdropper was detected only a short way into the prophecy and thrown from the building.’
‘So he only heard –?’
‘He heard only the beginning, the part foretelling the birth of a boy in July to parents who had thrice defied Voldemort. Consequently, he could not warn his master that to attack you would be to risk transferring power to you, and marking you as his equal.”
- Harry Potter and the Order of the Phoenix, Chapter 37 (The Lost Prophecy)
Após a continuação da sobrevivência de Harry, o Lord das Trevas achou que a profecia poderia conter alguma informação crucial que lhe permitiria ganhar vantagem e matar Harry.
“Voldemort tried to kill you when you were a child because of a prophecy made shortly before your birth. He knew the prophecy had been made, though he did not know its full contents. He set out to kill you when you were still a baby, believing he was fulfilling the terms of the prophecy. He discovered, to his cost, that he was mistaken, when the curse intended to kill you backfired. And so, since his return to his body, and particularly since your extraordinary escape from him last year, he has been determined to hear that prophecy in its entirety. This is the weapon he has been seeking so assiduously since his return: the knowledge of how to destroy you.”
- Harry Potter and the Order of the Phoenix, Chapter 37 (The Lost Prophecy)