the enemy in hand-to-hand combat. It takes us to the frontier with the world, and exposes us to the peril of counter-attack. Some never begin to evangelize for want of adequate incentives. Others begin, but grow discouraged and give up; they need fresh incentives. Others find their evangelism vitiated from the start because they are impelled by false motives. There is a great need for the Church to be purged of wrong motives and fired by right ones. What impels the Christian to