A creative artist works on his next composition because he was not satisfied with his previous one. (Dmitri Shostakovich, Russian composer and pianist)
Creative people seem never to be satisfied with their work. We may view their art, hear their music, or read their writings and think them to be near perfect. But the artist always feels a need for improvement. There is some better way to express the inspiration he feels. Artist or not, we should all try to make our next effort better than the previous one.
Whatever your hand finds to do, do it with all your might (Ecclesiastes 9:10). Whatever you do, work at it with all your heart (Colossians 3:23).