‘Never interrupt your opponent when he’s in the middle of making a mistake’, a quote attributed to Napoleon, in a way the ultimate ‘passive aggressive’.
Napoleon as the supreme strategist has much to teach us. Ideas can translate easily from large scale warfare to single combat; much like the way that Musashi Miyamoto and Sun Tzu did in their writings.
In a similar way Chinese philosophers spoke about the action of no-action, called ‘Wu-Wei’.
Doing nothing has ethical consequences as well; think if its effect in the world of law, “You may choose to say nothing but to do so may harm your defence….” says the police caution. Refusing to act when you should act is ethically wrong. Also think of the much-used quote, “For evil to triumph all it takes is for the good man to do nothing”.
I mentioned at the beginning about ‘passive aggressive’; I once worked with someone who when he observed a rival colleague (who he hated) about to commit a colossal screw up in front of the boss, instead of warning him off he stood by and watched it happen – ouch.
In fighting we learn to capitalise on an opponent’s mistakes; in tennis they are sometimes called ‘unforced errors’, but sometimes we manipulate the opponent into making mistakes, or we lure them into a trap they would struggle to get out of. Musashi in his Book of Five Rings wrote about forcing the opponent in to difficult positions, bad footings, light shining in their eyes, etc. all to gain advantage. In warfare, tactics are totally paramount; armies are manipulated into making bad decisions; the whole thing is about forcing errors.
I once witnessed Otsuka Hironori II training with another senior instructor during a break in a class. In free movement Master Otsuka easily lead the instructor into making errors, then capitalised on them, but then to keep the flow going, instead of allowing his opponent to fall on their face, one deft slap knocked him back on balance and he was able to reflexively launch another attack, only to be destabilised again, this went on for a while until Otsuka Sensei seemed to think enough was enough and finally (neatly and precisely) floored the instructor. What Otsuka Sensei was doing was cutting down his opponent’s options, which easily lead him in to trouble. Job done.