Some are just born bad, and that's all there is to it.

It's not funny, Jace," Alec interrupted, starting to his feet. "Are you just going to let her stand there and call me names?" "Yes," Jace said kindly. "It'll do you good-- try to think of it as endurance training.

The law is hard but it is the law.

I've never minded it," he went on. "Being lost, that is. I had always thought one could not truly be lost if one knew one's own heart. But I fear I may be lost without knowing yours.

You're a disaster for us, Clary! You're a mundane, you'll always be one, you'll never be a Shadowhunter! You don't know how to think like we do, think about what's best for everyone-- all you think about is yourself! But there's a war now, or there will be, and I don't have time or the inclination to follow around after you, trying to make sure you don't get us killed! Go home, Clary. Go home!

Ragnor and Catarina both begged him to give the instrument up. Random strangers on the street begged him to give the instrument up. Even cats ran away from him.

Change is not always accomplished peacefully, but that does not make it disadventageous.