“Course Dumbledore trusts you,” growled Moody. “He’s a trusting man, isn’t he? Believes in second chances. But me — I say there are spots that don’t come off, Snape. Spots that never come off, d’you know what I mean?”

“Mediocrity's like a spot on a shirt—it never comes off.”

“It kills me to think I didn't spot her headed for the rocks. Friends are supposed to act like harbor boats-let you know if you're off course.”

“That's wonderful. I do like a man that tells you right out he’s looking out for himself. Don’t we all? I don’t trust a man that says he’s not. And the man that’s telling the truth when he says he’s not I distrust most of all, because he’s and ass and an ass that’s going contrary to the laws of nature.”

“Never again mistrust me. Don’t turn your anger unfairly towards me. Trust isn’t something I bestow easily. It’s something precious. You have it or you don’t. Like faith, like love. It’s blind. It has to be. If I trust, if I love, I’ll always believe you; no matter the circumstances.”

“…I feel like he’s taking advantage of me. Advantage of my illness. He thinks he can rewrite history in any way that he likes and I will never know, never be any the wiser. But I do know. I know exactly what he’s doing. And so I don’t trust him. In the end he is pushing me away, Dr. Nash. Ruining everything.”