He was going to be armed with his wand - which, just now, felt like nothing more than a narrow strip of wood - against a fifty-foot-high, scaly, spike-ridden, fire-breathing dragon.

At that moment, Harry fully understood for the first time why people said Dumbledore was the only wizard Voldemort had ever feared. The look upon Dumbledore's face as he stared down at the unconscious form of Mad-Eye moody was more terrible than Harry could have ever imagined. There was no benign smile upon Dumbledore's face, no twinkle in the eyes behind the spectacles. There was cold fury in every line of the ancient face; a sense of power radiated from Dumbledore as though he were giving off burning heat.

Youth cannot know how age thinks and feels. But old men are guilty if they forget what it was to be young.

Would it hurt to die?

Dumbledore paused, and although his voice remained light and calm, and he gave no obvious sign of anger, Harry felt a kind of chill emanating from him and noticed that the Dursleys drew very slightly closer together. “You did not do as I asked. You have never treated Harry as a son. He has known nothing but neglect and often cruelty at your hands. The best that can be said is that he has at least escaped the appalling damage you have inflicted upon the unfortunate boy sitting between you.

And they'd [the Death Eaters] love to have me," said Harry sarcastically. "We'd be best pals if they didn't keep trying to do me in.

You can try, but you seem cleverer than Fudge, so I'd have thought you'd have learned from his mistakes. He tried intervening at Hogwarts. You might have noticed he's not Minister anymore, but Dumbledore's still headmaster. I'd leave Dumbledore alone, if I were you.