"What is truth but supreme beauty"?
Yea, the beautiful is the model, it is what stops and claims one, and sends one forth. The point is that Nietzsche is denying the fixed nature of the beloved, of the source of the unrestrained favoring (of what the will wills). God or the Good is like a stone which leaves a wave form in the water when it has been skipped, the beautiful is that
imago amidst the passing things of apperance. Eros draws toward it, the daemon protects against going the wrong way. The point here is that the knowledge of an abstract thing, just this one, is naive of its place in the whole. Ergo, the fullness of being comes from bringing the whole into the thing. In the simplest sense, one who can dance, a fine dance, only when they perfect the dance, bring the highest dignity, the most rich expression of the life of the human being to it, does it have the fullness of dance, and thereby cease to be merely a grotesque accident, a momentary nonsense or Chubby Checker dances the Twist, instead they reach the
kalon. The abstraction of ordinary being is the grotesque accident that has not gathered the fullness of being. However, in Nietzsche, the fullness is never perfect, it is
Fluss, it moves, it is the god Dionysus. A track that winds forever.