Ripley's Game,

Fantasy, an unflagging optimism is necessary for a writer at all stages of this rough game. A kind of madness is therefore necessary, when there is every logical reason for a state of depression and discouragement. Perhaps the fact that I can react with utter gloom to this is what keeps me from being psychotic and keeps me merely neurotic. I am doing quite a good day's work today. But I am also aware of the madness that actually sustains me, and I am not made more comfortable or happy by it.

She probably had all the time in the world, Therese thought, probably did nothing all day but what she felt like doing.

But love and hate, he thought now, good and evil, lived side by side in the human heart, and not merely in differing proportions in one man and the next, but all good and all evil. One had merely to look for a little of either to find it all, one had merely to scratch the surface. All things had opposites close by, every decision a reason against it, every animal an animal that destroys it, the male the female, the positive the negative... Nothing could be without its opposite bound up with it. Could space exist in a building without objects that stopped it? Could energy exist without matter, or matter without energy? Matter and energy, the inert and the active, once considered opposites, were now known to be one.

One interesting thing is that a stage is reached when nothing hurts any more. Things cannot become any worse, finally, for the one who is really depressed.

But there were too many points at which the other self could invade the self he wanted to preserve, and there were too many forms of invasion: certain words, sounds, lights, actions his hands or feet performed, and if he did nothing at all, heard and saw nothing, the shouting of some triumphant inner voice that shocked him and cowed him.