The idea of limiting Trump’s exposure to people might have seemed wise at first. But what it actually did was cut him off from trusted friends who kept him grounded and somewhat sane. Kelly’s move to isolate Trump drove him crazy; he watched even more cable news and relied on phone calls and social media—even more than before—to satisfy his deep need for positive feedback, in-person affirmation of his greatness, and an ear to vent to.
This is the most valuable insight in the whole book as I see it.
