Creation destroys as it goes, throws down one tree for the rise of another. But ideal mankind would abolish death, multiply itself million upon million, rear up city upon city, save every parasite alive, until the accumulation of mere existence is swollen to a horror.
A tree there is that from its topmost bough
Is half all glittering flame and half all green
Abounding foliage moistened with the dew;
And half is half and yet is all the scene;
And half and half consume what they renew.
It takes place, by and large, with the same sort of necessity as a tree brings forth fruit, and demands of the world no more than a soil on which the individual can flourish.