I think that perhaps Isan understood a wall tile in the same way Paul Nash understood a found object. In which case he might have said of this encounter that the mind of the ancient Buddhas is typical of what any reflective person might encounter. Wall tiles, like all inanimate objects, belong to the common world and are readily found, anywhere by anyone, but Nash would have added the qualification that, “to find you must be able to perceive.” Tozan was, of course, trying to understand Isan doctrinally, rather than to perceive with his senses.