Quotes from Orson Scott-Card

Peter had even named it once, when he said that he could always see what other people hated most about themselves, and bully them, while Val could always see what other people liked best themselves, and flatter them.

Valentine could persuade other people to her point of view- she could convince them that they wanted what she wanted them to want. Peter, on the other hand, could only make them fear what he wanted them to fear.

I don't want to destroy anybody. And I don't want war, either. I want the world to hold together. Is that so bad?

It's what I'm most afraid of. That I really am a monster. I don't want to be a killer but I just can't help it.