It's the ability to resist failure, in many ways, or use failure that often leads to the greatest success, isn't it?

Harry ran upstairs to their dark dormitory. He pulled out the cloak and then his eyes fell on the flute Hagrid had given him for Christmas. He pocketed it to use on Fluffy — he didn’t feel much like singing.

Failure meant a stripping away of the inessential. I stopped pretending to myself that I was anything other than what I was, and began to direct all my energy to finishing the only work that mattered to me. Had I really succeeded at anything else, I might never have found the determination to succeed in the one area where I truly belonged. I was set free, because my greatest fear had been realized, and I was still alive, and I still had a daughter whom I adored, and I had an old typewriter, and a big idea. And so rock bottom became a solid foundation on which I rebuilt my life.

Naturally Shirley had known, as they slid stock words and phrases back and forth between them like beads on an abacus, that Howard must be as brimful of ecstasy as she was; but to express these feelings out loud, when the news of death was still fresh in the air, would have been tantamount to dancing naked and shrieking obscenities, and Howard and Shirley were clothed, always, in an invisible layer of decorum that they never laid aside.

That's right," said Luna encouragingly, as if they were back in the Room of Requirement and this was simply spell practice for the D.A. "That's right, Harry... come on, think of something happy..." "Something happy?" he said, his voice cracked. "We're all still here," she whispered, "We're still fighting. Come on, now.

The only reason to delay at this point was because the immediate prospect was so deeply uninviting.

Harry - you're a great wizard, you know." "I'm not as good as you," said Harry, very embarrassed, as she let go of him. "Me!" said Hermione. "Books! And cleverness! There are more important things - friendship and bravery and - oh Harry - be careful!