Mishima, in his writing, is often preoccupied with aesthetic beauty. His characters slaver after it, long to assume it, and when apprehension is discovered to be forever out of reach, they long to remove this aesthetic beauty, this otherwordly perfection from the earth vis a vis a dramatic spectacle, which in turn becomes beauty itself.
Along with this obsession with beauty is a suspicion or a questioning of the intrinsic utility of beauty. What is the purpose of perfection if such perfection is ineffectual and even inimical to the human condition apart from the fact that beauty is beauty is beauty . . . ad nauseum?
In many ways Mishima uses Spring Snow as a means of inverting the sentiment of Keats' notion of "Beauty is truth, truth is beauty . . ." However, unlike the spectacle that beauty evokes in some of Mishima's other writings (and even his life), the bubble of spectacle never pops in Spring Snow, instead, beauty ferments and spreads like cancer.
In this novel, Mishima's main characters, Satoka and Kiyoaki, are destroyed by their beauty, their elegance, their noble breeding. Kiyoaki is analogous to Hamlet in his diffidence and his psychic inertia. Moreover, his brilliant physical beauty compounds the aforementioned with an overly large measure of pride, which, along with noble breeding, hermetically seals him into a jar of dreams, self-doubt, anomie, and ennui. Satoka, likewise, is beautiful, perfect, and her perfection carries and transmits a self-possessed, cold, and almost painful glare to the public eye. However, to Kiyoaki, Satoka is a smoldering woman of passion, full of riddles and intrigue. Kiyoaki, inexperienced, prideful, and naïve, desires to reciprocate this passion only when it becomes taboo, and then he falls headlong into a brilliant and lavish darkness full of gauntness, full, blush moons, and supple waves. Their consummation is sweet but tinctured with doom.
Had the two had a grander purpose than getting drunk off this surfeit of poisonous love, had their hearts and minds been bound to something to divert them from their egocentricity, the story would have been far different. But in the end, as Romeo and Juliet's love dies, the love of Satoka and Kiyoaki dies.
However, unlike Shakespeare, Mishima denies the reader the succor of suicide. Satoka is left a tonsured, Buddhist nun, while Kiyoaki dies of pneumonia. The end of beauty is filled with emotion, but the beautiful are ineffectual, useless, and cannot ever perform substantive act that will secure their happiness or seal their fate (definitely not in the case of Kiyoaki, perhaps in the case of Satoka). However, beauty does not completely fade at the death of their love as Kiyoaki leaves his dream journal to his even-keeled, logical, and diligent friend, Honda. In this way beauty lives on, but exists not as truth but as germ or infection. Beauty dies, destroys, and spreads its seed. It is the spring snow, quiet, pure, each multi-tendriled snowflake delicate, unique, an unusual attenuation heralding the end of spring, girded by the assumption that another spring will come only for the deadly beauty of the quiet, pure spring snow to come again, to take root, and surreptitiously and gracefully destroy idle youth.