Wayne A. Grudem, Ph.D., is Research Professor of Bible and Theology at Phoenix Seminary. For over 20 years he served as Professor of Biblical and Systematic Theology and as Chairman of the Department of Biblical and Systematic Theology at Trinity Evangelical Divinity School, Deerfield, Illinois. He has written over 60 articles in both popular and academic journals, and such books as "Systematic Theology: An Introduction to Biblical Doctrine, The Gift of Prophecy in the New Testament and Today and The First Epistle of Peter (TNTC).