M. David Sills is associate dean of Christian Missions and the A. P. and Faye Stone Professor of Christian Missions and Cultural Anthropology at the Southern Baptist Theological Seminary. He has planted and pastored churches in both the United States and Ecuador, and he is the founder and president of Reaching & Teaching International Ministries, a ministry to train pastors and leaders around the world. He is the author of The Missionary Call and Reaching and Teaching, as well as several books in Spanish.