There’s only one way that people change the past, Bela. They stop thinking about it. They move on. - Rudy Rucker

At first the tumbling had me totally disoriented. With each degree that I turned, the images around me would deform and change. Three given blobs might split or merge to two or five, while some other shape's angular facets would sprout interlocking crystals. It was a little like trying to make out a human body by watching a Carousel slideshow of three hundred sixty microtomed cross sections.

Even with omnividence and telepathy, I expect that, day in and day out, people won't actually change that much—not even in a million years. That's a lesson history teaches us. Yes, we've utterly changed our tech since the end of the Middle Ages, but the paintings of Hieronymus Bosch or Peter Bruegel show that people back then were much like us, perennially entangled with the seven deadly sins.

But after a while, some higher brain-center cut in, and I began being mentally able to fit the wildly changing scenery into a coherent four-dimensional whole. The process was really no more devious than the process by which one integrates the two hundred lines of a TV screen into a single two-dimensional image . . . which in turn is interpreted as a three-dimensional scene. It's just a matter of processing information. Impossible? I saw.