It was a truism that all civilizations were basically neurotic until they made contact with everybody else and found their place within the ever-changing meta-civilisation of other beings, because, until then, during the stage when they honestly believed they might be entirely alone in existence, all solo societies were possessed of both an inflated sense of their own importance and a kind of existential terror at the sheer scale and apparent emptiness of the universe.

Empathize with stupidity and you're halfway to thinking like an idiot.

By the usual reckoning, the worst books make the best films.

Experience as well as common sense indicated that the most reliable method of avoiding self-extinction was not to equip oneself with the means to accomplish it in the first place.

The bomb lives only as it is falling.

Hersesy is denying the word of God, and the word of God is much more reliably expressed in the natural world as it’s revealed through reason and science than in what I have heard described wonderfully as “the giant book of Jewish fairy stories".

Stories set in the Culture in which Things Went Wrong tended to start with humans losing or forgetting or deliberately leaving behind their terminal. It was a conventional opening, the equivalent of straying off the path in the wild woods in one age, or a car breaking down at night on a lonely road in another.