The term ignorance means the absence of enlightenment. Which is to say, delusion.
Abiding place means the place where the mind stops.
In the practice of Buddhism, there are said to be fifty-two stages, and within these fifty-two, the place where the mind stops at one thing is called the abiding place. Abiding signifies stopping, and stopping means the mind is being detained by some matter, which may be any matter at all.
To speak in terms of your own martial art, when you first notice the sword that is moving to strike you, if you think of meeting that sword just as it is, your mind will stop at the sword in just that position, your own movements will be undone, and you will be cut down by your opponent. This is what stopping means.
Although you see the sword that moves to strike you, if your mind is not detained by it and you meet the rhythm of the advancing sword, if you do not think of striking your opponent and no thoughts or judgments remain, if the instant you see the swinging sword your mind is not the least bit detained and you move straight in and wrench the sword away from him, the sword that was going to cut you down will become your own, and, contrarily, will be the sword that cuts down your opponent.
In Zen this is called “Grabbing the spear and, contrariwise, piercing the man who had come to pierce you.” The spear is a weapon. The heart of this is that the sword you wrest from your adversary becomes the sword that cuts him down. This is what you, in your style, call “No-Sword.”
Whether by the strike of the enemy or your own thrust, whether by the man who strikes or the sword that strikes, whether by position or rhythm, if your mind is diverted in any way, your actions will falter, and this can mean that you will be cut down.
If you place yourself before your opponent, your mind will be taken by him. You should not place your mind within yourself. Bracing the mind in the body is something done only at the inception of training, when one is a beginner.
The mind can be taken by the sword. If you put your mind in the rhythm of the contest, your mind can be taken by that as well. If you place your mind in your own sword, your mind can be taken by your own sword. Your mind stopping at any of these places, you become an empty shell. You surely recall such situations yourself. They can be said to apply to Buddhism.
In Buddhism, we call this stopping of the mind delusion. Thus we say, “The affliction of abiding in ignorance.”