Sun Tzu wrote one of the classics on warfare, and his principals are studied by military leaders to this day. Warfare is constantly changing conditions and the commander who is able to modify, and adapt quickly will win the battle. The commander must take all the information of the enemy and his own forces and find the BALANCE then change or TIP the balance in his favor.
In Martial Arts training Balance is a central part of training no matter what style or system one learns.
The Four Stages of Effective Martial Arts Training From this site
In the martial arts one should learn the concepts of Center of gravity, Balance, Shifting balance to defend or strike,
Solo Movement-Graceful movement requires stability and balance. Without these qualities, you must constantly engage your muscles (and your mind) just to keep from falling down. Solo movement training teaches you the exact amount of effort required to move your body from one position to another. To master solo movement is to end the fight between your mind, body, and the force of gravity.
Movement with a partner. This non-competitive training builds sensitivity to your partner’s position and intention.
Without training in this stage, you will often find yourself reacting to what your partner did in the past, or to what they might do in the future, rather than what they are doing in the present.
They have a Blind Spot, some of them, like Blinders for a horse drawing a buggy to keep it from worrying about distractions. Blinders are put up in front of the horses’ eyes so that they can focus on what lies ahead of them. So that they don’t get scared or distracted by things happening in their periphery vision. This helps horses but we need to we need to Take off OUR BLINDERS and reevaluate the PRESENT Situation. Some people only see their point of view and refuse to see the other sides. They don't even read the books and articles of "THEM" and therefore have a Blind Side or Blinders on, preventing them from hearing the heart and soul of THEM. And Them don't know about US, it is a vicious circle.