How we cite our quotes: (Volume.Chapter.Paragraph.)
Quote #1
He stopped, his mouth open, staring at her. He had not intended to say that. He had never allowed himself to think that before. (1.4.92)
There are all kinds of power in this book, many of them unexpected and strange. Here, Katie demonstrates an odd sort of power over Keating by encouraging him to be honest with himself.
Quote #2
Keating felt a warm pleasure; he had influenced the course of a human being, had thrown him off one path and pushed him into another [....] (1.5.10)
Keating starts sounding like a Wynand or a Toohey in training here. All three men love to manipulate and control other people and take pleasure in dominating others. It's notable that Keating hasn't destroyed anyone here though, yet. He merely "pushed" someone into a new direction.
Quote #3
He continued, knowing that he would continue only so long as Roark exhibited no anger, yet wishing desperately to break him down to an explosion. No explosion came. (1.7.87)
Keating and Roark often square off, and Keating never can seem to get the upper hand. The imagery here is interesting too, as two opposite concepts (breaking down and exploding out) are tied together.