Richard J. Foster is a renowned and well-regarded Christian author, teacher, and former pastor. His book, Celebration of Discipline is hailed by many as the best modern book on Christian spirituality. Some of his other books include Prayer, Freedom of Simplicity, and Streams of Living Water. Foster is founder of Renovaré, a Christian organization, dedicated to helping people to become more like Jesus (www.Renovare.org). He earned a Doctor of Pastoral Theology from Fuller Theological Seminary. Foster has served as a pastor, taught at universities and seminaries, and spoken worldwide on the subject of spiritual formation.