Last year, representatives from several prominent mission agencies, both national and expatriate, met to compare notes about the progress of their respective ministries in one Muslim-majority country. (The country's name is withheld for security reasons.) The representatives rejoiced that more than 1,000 "fellowships," as they call them, have been established for people from Muslim backgrounds. In fact, many of the fellowships had already planted new fellowships, and those fellowships had planted still more. Many thousands of Muslims in this nation alone, then, had found faith in Jesus.

Several of these fellowships can be traced back to small networks of Muslims who had encountered Christ and in turn began sharing with family and ...