I admire the many faith-based organizations in this country that provide services to those who are homeless or hungry or substance abusers or unwed moms or domestic violence victims or ex-convicts or others who need loving-kindness. But I especially appreciate the work of Christian missionaries. Those who have accepted the Great Commission set forth by Christ before he ascended to the Father: “Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all things that I have commanded you.” Jack...