Tucked away in ancient Sanskrit and Bengali texts is a secret teaching, a blissful devotional (bhakti) tradition that involves sacred congregational chanting (kīrtana), mindfulness practices (japa, smaraṇam), and the deepening of one's relationship with God (rasa). Brought to the world's stage by Śrī Chaitanya Mahāprabhu (1486-1533), and fully documented by his immediate followers, the Six Goswāmīs of Vrindāvan,...