Cool, but there's an error there. "Just sit" is not a Zen koan, although it is a meditative technique used in Zen-Buddhism, particularly the Japanese Soto schoo

Cool, but there's an error there. "Just sit" is not a Zen koan, although it is a meditative technique used in Zen-Buddhism, particularly the Japanese Soto school of Zen. See https://en.wikipedia.org/wiki/Shikantaza https://en.wikipedia.org/wiki/Shikantaza