But then, as she knew too well, the more fondly we imagine something will last forever, the more ephemeral it often proves to be. - Iain Banks

Naturalness?’ I said, loudly. ‘This lot’ll tell you anything is natural; they’ll tell you greed and hate and jealousy and paranoia and unthinking religious awe and fear of God and hating anybody who’s another colour or thinks different is natural. Hating blacks or hating whites or hating women or hating men or hating gays; that’s natural. Dog-eat-dog, looking out for number one, no lame ducks . . . Shit, they’re so convinced about what’s natural it’s the more sophisticated ones that’ll tell you suffering and evil are natural and necessary because otherwise you can’t have pleasure and goodness. They’ll tell you any one of their rotten stupid systems is the natural and right one, the one true way; what’s natural to them is whatever they can use to fight their own grimy corner and fuck everybody else. They’re no more natural than us than an amoeba is more natural than them just because it’s cruder.

Obsession is just what those too timorous to follow an idea through to its logical conclusion call determination.

He looked up from it at the stars again, and the view was warped and distorted by something in his eyes, which at first he thought was rain.