How we cite our quotes: (Page)
Quote #7
"You're a mystery to me, too, Doc."
"Me? A mystery?"
"Yes, you. You're not a Party man, but you work with us all the time; you never get anything for it. I don't know whether you believe in what we're doing or not, you never say, you just work. I've been out with you before, and I'm not sure you believe in the cause at all." (112)
Doc has just observed what a mystery Mac was to him, and now Mac returns the compliment. To be fair, Mac has a good point: why would a non-Party member risk his reputation and paycheck to take care of a bunch of dirty workers? Doc tells Mac that his interest is purely scientific. He wants to be in on the action so that he can get the "bigger picture"—he wants to determine the truth of the situation. It's also in Doc's nature to help people who are in need, regardless of the banner they march under.
Quote #8
"A man in a group isn't himself at all; he's a cell in an organism that isn't like him any more than the cells in your body are like you. I want to watch the group, and see what it's like. People have said, 'mobs are crazy, you can't tell what they'll do.' Why don't people look at mobs not as men, but as mobs? A mob nearly always seems to act reasonably, for a mob." (113-114)
Doc expounds on his idea that men in a mob are not the same as individual men. He uses a biological example (of course) to explain himself to Jim. He understands, as most people on the outside of a group do not, that mobs act with purpose. While the individual men in them lose their identity and personal will, the larger organism substitutes a group purpose and method to get things done. Doc believes that it is possible to understand the motives and actions of a mob, rather than simply dismissing them as a violent, unwashed bunch of people.
Quote #9
"The other side is made of men, Jim, men like you. Man hates himself. Psychologists say a man's self-love is balanced neatly with self-hate. Mankind must be the same. We fight ourselves and we can only win by killing every man. I'm lonely, Jim. I have nothing to hate." (199)
Doc tries to convince Jim that the other side—the landowners and their minions—are just people like the workers, on the most basic level. If Jim and Mac can hate them to the point of violence, it means that they are willing to hate themselves, and ultimately destroy themselves. Doc doesn't approve of the use of violent means to achieve the goals of the workers, and it throws him into despair at the state of things. And because Doc can't align himself with either Party politics or rampant capitalism, he finds himself in a very lonely position. There is little room in this narrative for such "high-falutin' ideas," so it's no surprise that Doc himself just... goes away.