Protas, the greatest fid of Thelenes, had climbed to the top of a mountain near Ethras and looked down upon the plain that nourished the city-state and observed the shadows of the clouds, and compared their shapes. He had had his famous upsight that while the shapes of the shadows undeniably answered to those of the clouds, the latter were infinitely more complex and more perfectly realized than the former, which were distorted not only by the loss of a spatial dimension but also by being projected onto terrain that was of irregular shape. Hiking back down, he had extended that upsight by noting that the mountain seemed to have a different shape every time he turned round to look back at it, even though he knew it had but one absolute form and that these seeming changes were mere figments of his shifting point of view. From there he had moved on to his greatest upsight of all, which was that these two observations—the one concerning the clouds, the other concerning the mountain—were themselves both shadows cast into his mind by the same greater, unifying idea. Returning to the Periklyne he had proclaimed his doctrine that all the things we thought we knew were shadows of more perfect things in a higher world. This had become the essential doctrine of Protism. If Protas could be respected for saying so, then what was wrong with me thinking that our Mynster, and this machine hall, were both shadows of some higher thing that existed elsewhere—a sacred place of which they were both shadows, and that cast other shadows in such places as Bazian arks and groves of ancient trees?