Things we lose have a way of coming back to us in the end, i... - J.K. Rowling, Harry Potter and the Order of the Phoenix

"I’ll make Goyle do lines, it’ll kill him, he hates writing,” said Ron happily. He lowered his voice to Goyle’s low grunt and, screwing up his face in a look of pained concentration, mimed writing in midair. “I... must... not... look... like... a... baboon’s... backside."

"Accio Brain!"

"We can't choose our fate, but we can choose others. Be careful in knowing that."

"You can laugh! But people used to believe there were no such things as the Blibbering Humdinger or the Crumple-Horned Snorkack!"

"Don’t put your wand there, boy! ... Better wizards than you have lost buttocks, you know!"