Here a monk doing kaihogyo walks between two such boulders, the Alpha and Omega, or in Japanese terms the AH and the UN, the first and last letters of the Buddhist Sanskrit alphabet. The AH boulder in the foreground has its mouth wide open while the UN (or HUM) in the background has its mouth tightly closed. And in between the beginning and end walk us human meditators, using this body and this life to serve all beings in their efforts to realize happiness and put an end to suffering.
