Converting people to another religion is illegal in Nepal, but missionaries are willing to risk prosecution to spread the Christian faith. "Victory to Jesus," Korean pastor Pang Chang-in cries as he blesses a new church in the village of Jharlang, in the foothills of the Himalayas. The congregation of the newly converted raise their hands in prayer. Most are from the indigenous Tamang community, who used to follow the Lama faith, an ancient spiritual practice. In Pang's eyes the Tamang people are "poor financially and spiritually". "So, a miracle takes place and the whole village converts," he says. Missionaries, many...