Nangaku says, ‘I am polishing it into a mirror.’ Baso says, ‘How can polishing a tile make it into a mirror?’ Nangaku says, ‘How can sitting in zazen make you into a buddha?’
Cooper presents the tile-polishing kōan as a paradox that collapses the distinction between futile effort and realization, with Dōgen reclaiming tile polishing as itself an expression of awakened practice.
, Zen Insight, Psychoanalytic Action: Two Arrows Meeting, 2019thesis