You mean old books?" "Stories written before space travel but about space travel." "How could there have been stories about space travel before --" "The writers," Pris said, "made it up.

Giving me a a new idea is like handing a cretin a gun, but I do thank you anyhow, bang bang.

But at least he can still see the lights below us. Although maybe for him it doesn't matter.

I mean, after all, you have to consider we're only made out of dust. That's admittedly not much to go on and we shouldn't forget that. But even considering, I mean it's sort of a bad beginning, we're not doing too bad. So I personally have faith that even in this lousy situation we're faced with we can make it. You get me?

There was a beauty in the trash of the alleys which I had never noticed before; my vision seemed sharpened, rather than impaired. As I walked along it seemed to me that the flattened beer cans and papers and weeds and junk mail had been arranged by the wind into patterns; these patterns, when I scrutinized them, lay distributed so as to comprise a visual language.

In one of the most brilliant papers in the English language Hume made it clear that what we speak of as 'causality' is nothing more than the phenomenon of repetition. When we mix sulphur with saltpeter and charcoal we always get gunpowder. This is true of every event subsumed by a causal law in other words, everything which can be called scientific knowledge. "It is custom which rules ," Hume said, and in that one sentence undermined both science and philosophy .

How much of what we call 'reality' is actually out there or rather within our own head?