From Soliloquies in England (1922): Santayana was part of a world that was rubbing its eyes after the end of what they called the Great War, wondering what it all meant and where civilization can go from here. The moment produced some fine (one might even say 'stellar') intellectual work. Hold that metaphor. Santayana, in Soliloquies , gave us this aphorism. "It would seem that when a heavenly body ceases to shine by its own light, it becomes capable of breeding eyes with which to profit by the light other bodies are shedding: whereas, so long as it was itself on fire, no part of it could see." What does that mean? I think I know, at least vaguely. And it is a better piece of work than some other famous Santayana quotes, including the condemned-to-repeat-it thing. On one level, Santayana means here what he says. When earth (and possibly other analogous planets) cooled a bit it became a host for life, and some of the lives made possible by this contain eyes capable ...