"The Challenge of the Disciplined Life" by Richard Foster is a very good book. Foster writes about how modern Christians can face the temptations of money, sex and power in the modern world/5(3). No issues touch us more profoundly or universally,' writes Richard Foster. 'No topics cause more controversy. No human realities have greater power to bless or curse. This helpful guide to Money, Sex & Power, Richard J. Foster's sequel to his bestselling Celebration of Discipline, expands the discussion of key issues a.