According to writer Amina Gautier in the September Glimmer Train Bulletin (#92):
Revision is the kick in the pants that propels the writer out of complacence, jars him from the euphoria that tends to come when he thinks he’s completed something. Revision is the inevitable and necessary faceoff between one’s lazy writer self who defends the good enough draft, “This sentence / passage / description / scene / character is fine the way it is” and one’s higher writing self who argues, “Yes, it’s good enough and it says what I want, but does it say it in the right way? Does it say it in the best way”
Read the whole craft essay here: Joy of Revision (yes, Joy!).