The never-tested, abstract knowledge of generations piles up. The physical world contains the scars of these centuries of rationalism: Almost no new cities match the beauty of the few remaining medieval city centers, which themselves are so cherished that people will spend thousands to fly there, just to see them in person for a few days. But tourists fly home, and never think of creating a new place, of creating something that constitutes an artistic endeavor beyond themselves. Rather they will leave building to builders and zoning codes, who will plan the next warehouses for humans, for rarely today can people verbalize their values in any other terms than the economic. Rationalistic thinking alone leads people to downplay human nature rather than celebrate it, and the results are everywhere before us. Most of us, though we often know something is wrong or even deeply troubling with the aesthetics of a place or situation, do not even have the vocabulary to dissent.