"God sees it," replies the watchmaker.
knew in advance it would never be published.
Seymour identifies three aspects of aesthetic beauty that humans inevitably respond to: Poignancy, Pathos, and Triumph. Clearly these aspects should be kept in balance--too much pathos results in sentimentality; too much triumph is simply unbelievable; and any reader will eventually tire of wall-to-wall poignancy (exactly where humor can cut through the fluff, like adding acid and salt to an over-sweetened dish.)
If you haven't, check out Google's ArtProject here for further inspiration (James Elkins argues that too much reading stunts our visual sense, which we badly need as writers). Below is Seymour's 20-minute talk. He loses me when he waxes poetic on the motorcycle design (clearly not my thing), but the first half of the talk is riveting.