Such that meeting it is its own reward. Beauty is a fact about the meeting, not a property held alone.
Middle English beautiful builds on beauty, from Old French biauté, from Vulgar Latin *bellitas, from Latin bellus (pretty, fine, handsome) — a softer word than its cousin bonus (good).
Names the meeting rather than the object: a thing counted beautiful in this house rewards attention on its own terms, not one graded against a standard held elsewhere.