I remember the first time Kosaka Sensei asked me to lead a public introduction to meditation class.
He instructed me to teach how to meditate. I began with all the rules of how to sit, much like Master Dogen laid them out for us.
As I neared the end of all the rules, Kosaka Sensei signaled me to finish. I finished, introduced him, and I gave him the floor.
The first thing he said was, 'There are no rules'.