Dr. George Knight is a semi-retired minister in the Orthodox Presbyterian Church who continues to serve both as Chairman of the denomination's Committee on Ecumenicity, and also as Chairman of the Board of Greenville Presbyterian Theological Seminary and adjunct Professor of New Testament.  Dr. Knight and his wife worship at Redeemer Presbyterian Church (OPC) in Charlotte, NC, where he is the called Teacher for the church.  He and his wife, Virginia, have five married children, ten grandchildren and one great granddaughter.

Dr. Richard Gaffin serves as Charles Krahe Professor of Biblical and Systematic Theology, Emeritusat Westminster Theological Seminary in Philadelphia.  He is the author of The Centrality of the Resurrection; Perspectives on Pentecost; Calvin and the Sabbath; and By Faith, Not by Sight: Paul and the Order of Salvation.