Zen students are with their masters at least ten years before they presume to teach others, after all learning all one can isn’t as easy as learning how to ask a girl out or how to ride ones bicycle. These are lessons that take the span of a decade to master. Nan-in was visited by Tenno, who, having passed his apprenticeship, had become a teacher. The day happened to be rainy, so Tenno wore wooden clogs and carried an umbrella. After greeting him Nan-in remarked: “I suppose you left your wodden clogs in the vestibule. I want to know if your umbrella is on the right or left side of the clogs.”
Tenno, confused, had no instant answer . He realized that he was unable to carry his Zen every minute. He became Nan-in’s pupil, and he studied six more years to accomplish his every-minute Zen.