With a "gutless orthodoxy," Christians today quickly affirm biblical truth regarding evangelism and mission, but, author Jeremy Walker reminds us, "we cannot pretend that we know and believe the truth about men, souls, heaven, hell, and salvation unless it is making a difference in the way we think, feel, pray, speak, and act." How do Christians develop this sense of urgency to see lost sinners saved? What motivates our evangelism? We must have...