"Over the decades I watched Tennessee at work in Rome, Paris, Key West, New Haven . . . He worked every morning on whatever was at hand. If there was no play to be finished or new dialogue to be sent round to the theater, he would open a drawer and take out the draft of a story already written and begin to rewrite it. I once caught him in the act of revising a short story that had just been published. "Why," I asked, "rewrite what's already in print?" He looked at me, vaguely, then said, "Well, obviously it's not finished." And went back to his typing.
As an inveterate reviser, I love this. Before I consider something even approximately finished, I have probably worked on revising it for weeks. Every time I send something out, I revise it again.
I totally understand one of the Impressionist painters, Bonnard (?) maybe, who was caught sneaking with his paints into the exhibition where his pictures were hanging, just touching it up a little.