With future perfect (F2) you jump to a point in the future, turn round and say some action is finished then. Actually a complicated thing and cumbersome and in most cases you can express the same idea much simpler without using F2. This tense existed in Latin and it was imitated by writers.
In current English usage, muse can refer in general to a person who inspires an artist, writer, or musician.
bust - a sculpture of the head and shoulders of a person. carving - a sculpture created by removing material (as wood or ivory or stone) in order to create a desired shape. marble - a sculpture carved from marble. mobile - sculpture suspended in midair whose delicately balanced parts can be set in motion by air currents