David M. Gustafson is chair of the mission and evangelism department at Trinity Evangelical Divinity School in Deerfield, Illinois. He is also the author of Gospel Witness: Evange...view more David M. Gustafson is chair of the mission and evangelism department at Trinity Evangelical Divinity School in Deerfield, Illinois. He is also the author of Gospel Witness: Evangelism in Word and Deed.view less