Beloved Trappist monk Thomas Keating is best known as one of the primary founders of the Centering Prayer movement, which made the contemplative dimension of Christianity accessible through a simple method of silent, still meditation. He is also known as the convener of the Snowmass Interreligious Conference, which helped spawn the global Interspiritual movement. Keating's open invitation to people of all walks to embark on a spiritual journey, coupled with his emphasis on the oneness of all creation, made him a 20th-century harbinger of 21st-century ideals.