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 .

I think that, like in my writing, reality is always a soap bubble, Silly Putty thing anyway. In the universe people are in, people put their hands through the walls, and it turns out they're living in another century entirely. I often have the feeling — and it does show up in my books — that this is all just a stage.

You know what the doctor said to me to cheer me up?" Fat said. "There are worse diseases than cancer." "Did he show you slides?" We both laughed. When you are nearly crazy with grief, you laugh at what you can.

My major preoccupation is the question, 'What is reality ?' Many of my stories and novels deal with psychotic states or drug-induced states by which I can present the concept of a multiverse rather than a universe. Music and sociology are themes in my novels, also radical political trends; in particular I've written about fascism and my fear of it.

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?

The frogs hopping indoors agree that we are on a prison planet. They themselves are frog criminals that were convicted of doing frog crimes.

What is possible and what is not possible is not objectively known but is, rather, a subjective belief on the part of the author and of the reader.