“Men are destroyed, and destroy each other, over basic things – money or hatred. On the other hand a really complicated riddle never pushed anyone to violence; either you found the answer or gave up looking. Clouds were riddles too, but dangerously simple ones. If you zoomed in on one part of a cloud and took a photograph, then enlarged the image, you would find that a cloud’s edges seemed like another cloud, and those edges yet another, and so on. Every part of a cloud, in other words, reiterates the whole. Therefore each cloud might be called infinite, because its very surface is composed of other clouds, and those clouds of still other clouds, and so forth. Some learn to lean over the abyss of these brainteasers; others lose their balance and tumble into its eternal blackness.”