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Learning to set the two sides in motion is a profound visual meditation.
In terms of combat, Highest Yin means you've passed the point of no return and can no longer retreat. Starving, exhausted, thirsty and out of will. Certain defeat.
Sated, rested, hydrated, battle readiness absolutely complete; you cannot lose.
Yin = Empty, Weak, Vulnerable, Hungry, Tired
Yang = Full, Strong, Invulnerable, Sated, Rested
1) Too far for swords to touch
2) Fighting range where swords engage, but you can't hit each other
3) Death range where you kill or get killed, wound or get wounded
4) Retreat to engagement range
5) Retreat out of engagement range