Change is a continuous process. You cannot assess it with the static yardstick of a limited time frame. When a seed is sown into the ground, you cannot immediately see the plant. You have to be patient. With time, it grows into a large tree. And then the flowers bloom, and only then can the fruits be plucked.
The artist works with a concentration of his whole personality, and the conscious part of it resolves conflicts, organized memories, and prevents him from trying to walk in two directions at the same time.