When I start writing a novel, I never know much about the plot, and certainly not the ending. I simply have an idea, or an image, or a sentence that has been lurking for a while. So I suppose my first sentences have to be interesting and appealing enough to lead me down the path they reveal. I very much decide things on the spot, I improvise a lot. But, once I make a decision, I almost never go back on it. I stick to what I said on page 10, even if on page 200 I discover that it would have been easier to say something different on page 10. I realize this is absurd—and perhaps suicidal—but I apply to my novels the same principle of knowledge that rules life: at 40 you may wish you had made a different decision when you were 20, but you can’t go back. Well, in my novels it is the same. The funny thing is that many critics have pointed out that, often, on my very first page, there is a sort of “summary” of the whole novel. But, as I have said many times before, I don’t have a map when I write, just a compass. So I know I am heading “north,” as it were, but not the way I will get there.