How do you know when a work is complete?
An artist spends the majority of his time in gestation, learning and absorbing aspects of what constitute the natural and spiritual world. The artist may then attempt to resolve a task--a task typically connected to a personal or emotional interest. What follows then is a process, the artist's procedural attempt to complete the task to the standard of his knowledge.
Some espouse that the work is never done. This notion only makes sense in the collective--the idea that there will always be artists who deign to vest themselves in the habits of their predecessors. Otherwise, an individual work of art does have its terminal. It is only the artist who's conceived of its possibility that holds the key to its completion.
Something clicks. If the artist is given sufficient time and space, away from distraction.