And yet we knew, for a certainty, that when first emissaries of Earth went walking among the planets, Earth's other sons would be dreaming not about … - Stanisław Lem

It is said, for example, that dragons can sometimes have seven heads. This is sheer nonsense. A dragon can have only one head, for the simple reason that having two leads to disagreements and violent quarrels; the polyhydroids, as the scholars call them, died out as a result of internal feuds. Stubborn and headstrong by nature, dragons cannot tolerate opposition, therefore two heads in one body will always bring about a swift death: each head, purely to spite the other, refuses to eat, then maliciously holds its breath — with the usual consequences. It was this phenomenon which Euphorius Cloy exploited when he invented the anticapita cannon. A small auxiliary electron head is discharged into the dragon's body. This immediately gives rise to unreconcilable differences of opinion and the dragon is immobilized by the ensuing deadlock. Often it will stand there, stiff as a board, for a day, a week, even a month; sometimes a year goes by before the beast will collapse, exhausted. Then you can do with it what you will.

My past had disappeared. Not that I believed for a moment that this was an accident; in fact, I had suspected for some time now that the Cosmic Command, obviously no longer able to supervise every assignment on an individual basis when there were literally trillions of matters in its charge, had switched over to a random system. The assumption would be that every document, circulating endlessly from desk to desk, must eventually hit upon the right one. A time-consuming procedure, perhaps, but one that would never fail. The Universe itself operated on the same principle. And for an institution as everlasting as the Universe — certainly our Building was such an institution — the speed at which these meanderings and perturbations took place was of no consequence.

We’re not searching for anything except people. We don’t need other worlds. We need mirrors.