“An Unbreakable Vow?" said Ron, looking stunned. "Nah, he can’t have.... Are you sure?""Yes I’m sure," said Harry. "Why, what does it mean?""Well, you can’t break an Unbreakable Vow...""I’d worked that much out for myself, funnily enough.”

“Well, you can't break an unbreakable vow," said Ron."I figured that out myself, funnily enough.”

“Just — just to be clear,” he said. “You want to leave Tonks at her parents’ house and come away with us?”“She’ll be perfectly safe there, they’ll look after her,” said Lupin. He spoke with a finality bordering on indifference. “Harry, I’m sure James would have wanted me to stick with you.”“Well,” said Harry slowly, “I’m not. I’m pretty sure my father would have wanted to know why you aren’t sticking with your own kid, actually.”

“I can’t explain what I mean. And even if I could, I’m not sure I’d feel like it.”

“This is your copy of Advanced Potion-Making, is it, Potter?”“Yes,” said Harry, still breathing hard.“You’re quite sure of that, are you, Potter?”“Yes,” said Harry, with a touch more defiance.“This is the copy of Advanced Potion-Making that you purchased from Flourish and Blotts?”“Yes,” said Harry firmly.“Then why,” asked Snape, “does it have the name ‘Roonil Wazlib’ written inside the front cover?”Harry’s heart missed a beat. “That’s my nickname,” he said.”

“Well, here goes," said Harry, and he raised the little bottle and took a carefully measured gulp."What does it feel like?" whispered Hermione.Harry did not answer for a moment. Then, slowly but surely, an exhilarating sense of infinite opportunity stole through him; he felt as though he could have done anything, anything at all...and getting the memory from Slughorn seemed suddenly not only possible, but positively easy....He got to his feet, smiling, brimming with confidence."Excellent," he said. "Really excellent. Right...I'm going down to Hagrid's.""What?" said Ron and Hermione together, looking aghast. "No, Harry - you've got to go and see Slughorn, remember?" said Hermione."No," said Harry confidently. "I'm going to Hagrid's, I've got a good feeling about going to Hagrid's.""You've got a good feeling about burying a giant spider?" asked Ron, looking stunned."Yeah," said Harry, pulling his Invisibility Cloak out of his bag. "I feel like it's the place to be tonight, you know what I mean?" "No," said Ron and Hermione together, both looking positively alarmed now."This is Felix Felicis, I suppose?" said Hermione anxiously, holding up the bottle to the light. "You haven't got another little bottle full - I don't know -""Essence of Insanity?" suggested Ron, as Harry swung his cloak over his shoulders.”