Shoju taught Hakuin and his fellow students in this way:
"Suppose at some future day you men have temples of your own. You receive an invitation from one of your parishioners, asking you to visit him at his home. When you arrive with your head monk and some of your students, you are ushered into a large room, where you find layers of thick, soft cushions to sit upon. Dishes filled with rare delicacies are arranged before you. You sit there in high spirits, partaking of the food without a single qualm, regarding it as your due. When you finish eating, as you are enjoying yourself amid the loud talk and boisterous laughter, one of the people present addresses you, and brings up a difficult point of Zen - the kind that furrows the brows of Zen monks. He suggests casually that you explain it. At that moment, what kind of response will you make? Your heart will probably start to thump wildly in your chest. Your body will break out in a muck of sweat. Your distress will cast a black pall over the entire room.
"So inasmuch as you are members of the Zen school, you should concentrate diligently on your training. If you don't, you will be unwittingly sowing the seeds of your own shame and disgrace. There's no telling when you'll find yourself in such a harrowing situation. It's too terrifying to contemplate."
Realm of a Thousand Buddhas, trans. Norman Waddell