Such indeed, for despite the rules and science discussed, there is much art and cunning that may be found between the admonishments of Sun Tzu.
Many disciplines, from painting to swordplay, start as a science, with the student following strict patterns and rules. With practice, they begin to feel the subject rather than obeying it. In this way it becomes art. That deeper connection then allows the student to effectively develop their personal style and so become a master.