Richard Foster ( religion ) Richard Foster Richard J. Foster is a Christian theologian and author in the Quaker tradition . His writings speak to a broad Christian audience . He has been a professor at Friends University and pastor of Evangelical Friends churches . Foster resides in Denver , Colorado . Foster is best known for his 1978 book Celebration of Discipline ( ISBN 0-06-062839-1 ) , which examines the inward disciplines of prayer , fasting , and meditation in the Christian life , the outward disciplines of simplicity , submission , and service , and the corporate disciplines of confession , worship , and celebration . It has sold over one million copies . It was named by Christianity Today as one of the top ten books of the twentieth century . He also wrote Freedom of Simplicity ( 1981 , ISBN 0-06-104385-0 ) which further explores the discipline of simple , intentional living , Prayer : Finding the Heart 's True Home ( 1992 , ISBN 0-06-062846-4 ) , which explores 21 different types of Christian prayer , edited Devotional Classics ( 1993 , ISBN 0-06-066966-7 ) , a devotional guide featuring Christian wisdom through the ages , and wrote Streams of Living Water ( 2001 , ISBN 0-06-062822-7 ) , which examines the place of the different spiritual traditions in Christianity . In 1988 Foster founded Renovaré , a Christian renewal para-Church organization . As Foster encourages the utilization of classical Christian wisdom , he functions within the realm of paleo-orthodoxy . This Christianity -related biographical article is a stub . You can help Wikipedia by expanding it . Categories : Living people | Christian writers | American theologians | Quakers | Christian evangelicalism | Christian biography stubs In other languages : Svenska 