“Power was my weakness and my temptation.”

“There is no good and evil, there is only power and those too weak to seek it.”

“They thought I'd die in the attempt, but I'm here and you're in my power. I'm the one with the wand. You're at my mercy.""No, Draco," said Dumbledore quietly. "It is my mercy, and not yours, that matters now.”

“But I got this far, didn’t I?” he said slowly. “They thought I’d die in the attempt, but I’m here . . . and you’re in my power. . . . I’m the one with the wand. . . . you’re at my mercy. . .”

“If you rip, tear, shred, bend, fold, deface, disfigure, smear, smudge, throw, drop, or in any other manner damage, mistreat, or show lack of respect towards this book, the consequences will be as awful as it is within my power to make them.”

“He felt even angrier that Dumbledore was showing signs of weakness. He had no business being weak when Harry wanted to rage and storm at him.”

“Then you will find yourself easy prey for the Dark Lord!" said Snape savagely. "Fools who wear their hearts proudly on their sleeves, who cannot control their emotions, who wallow in sad memories and allow themselves to be provoked so easily - weak people, in other words - they stand no chance against his powers! He will penetrate your mind with absurd ease, Potter!”