This talk is about two men of the twentieth century, giants in their own right, the monk Thomas Merton and the Beat writer Jack Kerouac who as Roman Catholics studied Zen Buddhism. Both had a great deal common: Celtic ancestry, students at Columbia University, grounded in a spirituality of nature and a love of animals that reflected their respect for all sensate creatures. Both too had a dark side, prone to depression, struggling with sanity, even suicide at times. This talk discusses their similarities and differences, focusing upon their satori experiences, a Zen term for awakenings, epiphanies, enlightenment.   Ed Sellner, Ph.D., is professor emeritus in theology and spirituality at Saint Catherine University in St Paul, Minnesota, where he taught and administered programs for 35 years. A graduate of the University of Notre Dame, he is author of numerous books on Celtic spirituality, western and eastern monasticism, and animal theology. Ed is also a spiritual director, trained at the Jung Institute in Zurich, Switzerland.