What Is the Sound of One Hand Clapping‪?‬

Hakuin Ekaku transformed fear into realizing that compassion for others is life's purpose. To awaken to this truth, Hakuin faced doubt in his mind, meditating on conundrums. He created one of the greatest of all: "What is the sound of one hand clapping?" Hakuin, who lived near Japan's Mount Fuji in the eighteenth century, advocated discipline and living a virtuous life.