This is a new edition of a BRF classic (first published 1996). It provides an accessible introduction to how use the "Jesus Prayer" as a devotional practice.It provides helpful biblical and historical background.It includes new introduction, some minor internal revisions and an updated bibliography.It is suitable for people interested in prayer and spirituality, particularly insights from other churches/cultures, and people who liked the first edition of this book and want a new copy - or to buy it for friends, or those who bought "Praying the Jesus Prayer Together", "Lord Jesus Christ, and Son of God, have mercy on me."Simon Barrington-Ward teaches us how to use the "Jesus Prayer" (above), and opens up Bible passages which are crucial to understanding it. This ancient prayer has been known and loved by generations of Christians for hundreds of years. It is a way of entering into the river of prayer which flows from the heart of God: the prayer of God himself, as Jesus continually prays for his people and for the world which he loves.