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.
What is CREATIVITY? An area of study focused on the new ideas, alternatives, or possibilities that can facilitate problem solving, communicating with others, and go beyond conventional developments. CREATIVITY: Creativity allows a person to think outside of the box..