Joe

“And his knowledge remained woefully incomplete, Harry! That which Voldemort does not value, he takes no trouble to comprehend. Of house-elves and children's tales, of love, loyalty, and innocence, Voldemort knows and understands nothing. Nothing. That they all have a power beyond his own, a power beyond the reach of any magic, is a truth he has never grasped...”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“Karkaroff intends to flee if the Mark burns."
"Does he?" said Dumbledore softly, as Fleur Delacour and Roger Davies came giggling in from the grounds. "And are you tempted to join him?"
"No," said Snape, his black eyes on Fleur's and Roger's retreating figures. "I am not such a coward."
"No," agreed Dumbledore. You are a braver man by far than Igot Karkaroff. You know, I sometimes think we Sort too soon..."
He walked away, leaving Snape looking stricken.”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“Do you see, Harry? Do you see the flaw in my brilliant plan now? I had fallen into the trap I had foreseen, that I had told myself I could avoid, that I must avoid.”

“I don’t —”

“I cared about you too much,” said Dumbledore simply. “I cared more for your happiness than your knowing the truth, more for your peace of mind than my plan, more for your life than the lives that might be lost if the plan failed. In other words, I acted exactly as Voldemort expects we fools who love to act.

“Is there a defense? I defy anyone who has watched you as I have — and I have watched you more closely than you can have imagined — not to want to save you more pain than you had already suffered. What did I care if numbers of nameless and faceless people and creatures were slaughtered in the vague future, if in the here and now you were alive, and well, and happy? I never dreamed that I would have such a person on my hands.”
― J.K. Rowling, Harry Potter and the Order of the Phoenix

“Do you know why Satan is so angry all the time? Because whenever he works a particularly clever bit of mischief God uses it to serve his own Rigteous purposes."
"So God uses wicked people as his tools?"
"God gives us the freedom to to do great evil, if we choose, then He uses his own freedom to create goodness out of that evil, for that is what He chooses."
"So, in the long run, God always wins?"
"Yes, in the short run though it can be uncomfortable.”
― Orson Scott Card, Ender's Shadow