So it is said that if you know your enemies and know yourself, you can win a hundred battles without a single loss.
If you only know yourself, but not your opponent, you may win or may lose.
If you know neither yourself nor your enemy, you will always endanger yourself.
– Sun Tzu, The Art of War
The mind is primary, number one, any action or decision you take first starts as a thought in your mind and if martial arts is a set of movements you make in response to a set of movements your opponent makes, does it not make sense that you should train your mind first.