O'Brian quotes from 1984:
"There will be no curiosity, no enjoyment of the process of life. All competing pleasures will be destroyed. But always ? do not forget this, Winston ? always there will be the intoxication of power, constantly increasing and constantly growing subtler. Always, at every moment, there will be the thrill of victory, the sensation of trampling on an enemy who is helpless. If you want a picture of the future, imagine a boot stamping on a human face ? forever."
"When finally you surrender to us, it must be of your own free will. We do not destroy the heretic because he resists us: so long as he resists us we never destroy him. We convert him, we capture his inner mind, we reshape him. We burn all evil and all illusion out of him; we bring him over to our side, not in appearance, but genuinely, heart and soul. We make him one of ourselves before we kill him. It is intolerable to us that an erroneous thought should exist anywhere in the world, however secret and powerless it may be. Even in the instant of death we cannot permit any deviation. In the old days the heretic walked to the stake still a heretic, proclaiming his heresy, exulting in it. Even the victim of the Russian purges could carry rebellion locked up in his skull as he walked down the passage waiting for the bullet. But we make the brain perfect before we blow it out."
"What happens to you here is for ever. Understand that in advance. We shall crush you down to the point from which there is no coming back. Things will happen to you from which you could not recover, if you lived a thousand years. Never again will you be capable of ordinary human feeling. Everything will be dead inside you. Never again will you be capable of love, or friendship, or joy of living, or laughter, or curiosity, or courage, or integrity. You will be hollow. We shall squeeze you empty and then we shall fill you with ourselves."