Any Sensei Is a Bit Mercurial at Times
Any sensei is a bit mercurial at times—they do it to keep you guessing. Part of the mystery of a really good martial arts teacher is the way in which you’re perpetually surprised by things, kept just slightly off balance. I had a karate teacher years ago, and every time I thought, OK this guy has shown me just about everything he’s got, he would waltz in and do something I had never seen before. Then he would look at me like he could read my mind.
— Sensei, chapter 4