O, mighty, divinely delimited wisdom of walls, boundaries! I...

O, mighty, divinely delimited wisdom of walls, boundaries! I is perhaps the most magnificent of all inventions. Man ceased to be a wild animal only when he build the first wall. Men ceased to be a wild man only when we built the Green Wall, only when, by means of that wall, we isolated our perfect machine world from the irrational, ugly world of trees, birds, and animals...