Why mind training is essential in Martial Arts?

To reach the full potential as a martial arts practitioner, one must begin by training the mind. One way to accomplish this task is through sitting meditation. Through meditation ones awareness, calm, and focus will increase. These are all very important factors in martial arts. Without awareness, it will not be able to fight in a battle without getting hit or even killed. Without focus, it will not be able to catch the right opportunity to strike or defend, which could be disastrous. Without calmness, it will not be able to focus or relax. So one must learn how to manipulate the internal energy as well as the universal energy so it will not disperse unused. Also you can activate more energy when it is really necessary.