John Piper shares this story of Clarence Duncan’s Ministry to the Yao in a sermon, The Leading of the Lord in Personal Evangelism” In 1985 Clarence Duncan arrived in Africa as missionary to the solidly Muslim people called the Yao who live mainly in Tanzania, Mozambique, and Malawi. When he settled in his village, he called … More God has yet more wonders to show us in the work of evangelism and world missions than we can imagine