 He can't stand it. He tries harder, pushing himself until he quits. Often he gets injured. And the third kind of non-master is the hacker. The person who, after reaching the plateau, is willing to stay there. If it's golf, he gets locked into an eccentric but adequate swing and is satisfied with it. If it's tennis, he develops a solid forehand and figures he can make do with his backhand. If it's martial arts, he likes the power but not the endless discipline. He's a good guy to have around, but he's not on the journey necessarily.