Labor of Love of Labor

It occurred to me while watching the Banksy film Exit Through the Gift Shop, that labor is one of the only qualities an artist cannot insert artificially into her work. Invested time cannot be faked on the cellular level, the level of the art's effect on the artist. Labor is not a quality that appears in any measurable sense in a finished work, or course, but it does, I think, have a permanent developmental effect on the creator. The transformative power of extensive personal effort is an ineffable but vital component of most interesting pieces. For one, investing a huge chunk of your life in something is the surest way of developing a style that combines the best qualities of intellect and instinct. One artist's style can be faked by another of course, but this is beside the point. I am only interested in what is happening to the artist in the process of laboring to earn that style.