J.K. Rowling

"Grief, it seemed, drove Voldemort out...though Dumbledore, of course, would have said that it was love."

"“Indifference and neglect often do much more damage than outright dislike.”"

"“Death's got an Invisibility Cloak? Harry interrupted again. So he can sneak up on people, said Ron. Sometimes he gets bored of running at them, flapping his arms and shrieking...”"

"“I DON'T CARE! Harry yelled at them, snatching up a lunascope and throwing it into the fireplace. I'VE HAD ENOUGH, I'VE SEEN ENOUGH, I WANT OUT, I WANT IT TO END, I DON'T CARE ANYMORE!You do care, said Dumbledore. He had not flinched or made a single move to stop Harry demolishing his office. His expression was calm, almost detached. You care so much you feel as though you will bleed to death with the pain of it.”"

"“Things we lose have a way of coming back to us in the end, if not always in the way we expect.”"

"“There was a clatter as the basilisk fangs cascaded out of Hermione's arms. Running at Ron, she flung them around his neck and kissed him full on the mouth. Ron threw away the fangs and broomstick he was holding and responded with such enthusiasm that he lifted Hermione off her feet. Is this the moment? Harry asked weakly, and when nothing happened except that Ron and Hermione gripped each other still more firmly and swayed on the spot, he raised his voice. OI! There's a war going on here! Ron and Hermione broke apart, their arms still around each other. I know, mate, said Ron, who looked as though he had recently been hit on the back of the head with a Bludger, so it's now or never, isn't it? Never mind that, what about the Horcrux? Harry shouted. D'you think you could just --- just hold it in, until we've got the diadem? Yeah --- right --- sorry --- said Ron, and he and Hermione set about gathering up fangs, both pink in the face.”"

"The most important thing is to read as much as you can, like I did. It will give you an understanding of what makes good writing and it will enlarge your vocabulary."

"“The truth. Dumbledore sighed. It is a beautiful and terrible thing, and should therefore be treated with great caution.”"

"You can't live without failing at something, unless you love so cautiously you might as well have nit lived at all, in which case, you fail be default."

"Depression isn't just being a bit sad. It's feeling nothing. It's not wanting to be alive anymore."

"“Do you remember me telling you we are practicing non-verbal spells, Potter?Yes, said Harry stiffly. Yes, sir. There's no need to call me sir Professor. The words had escaped him before he knew what he was saying.”"

"“To the well-organized mind, death is but the next great adventure.”"

"It’s so difficult to describe depression to someone who’s never been there, because it’s not sadness. I know sadness. Sadness is to cry and to feel. But it’s that cold absence of feeling— that really hollowed-out feeling."

"Depression is the most unpleasant thing I have ever experienced. . . . It is that absence of being able to envisage that you will ever be cheerful again. The absence of hope. That very deadened feeling, which is so very different from feeling sad. Sad hurts but it's a healthy feeling. It is a necessary thing to feel. Depression is very different."

"“It does not do to dwell on dreams and forget to live.”"

"“Dumbledore watched her fly away, and as her silvery glow faded he turned back to Snape, and his eyes were full of tears. After all this time?Always, said Snape.”"

"Would he ever have the strength to stop looking?"

"Very early on in writing the series, I remember a female journalist saying to me that Mrs Weasley, 'Well, you know, she’s just a mother.' And I was absolutely incensed by that comment. Now, I consider myself to be a feminist, and I’d always wanted to show that just because a woman has made a choice, a free choice to say, 'Well, I’m going to raise my family and that’s going to be my choice. I may go back to a career, I may have a career part time, but that’s my choice.' Doesn’t mean that that’s all she can do. And as we proved there in that little battle, Molly Weasley comes out and proves herself the equal of any warrior on that battlefield."

"Words are, in my not-so-humble opinion, our most inexhaustible source of magic..."

"He had a powerful kind of ache inside of him, half joy, half terrible sadness."