Jon M. Isaak has served the Mennonite Brethren Church as missionary and professor since 1987. In Fresno, California he has taught New Testament Studies at Mennonite Brethren Biblical Seminary and F...ver maisJon M. Isaak has served the Mennonite Brethren Church as missionary and professor since 1987. In Fresno, California he has taught New Testament Studies at Mennonite Brethren Biblical Seminary and Fresno Pacific University. He is author of God Is One and God Is Fair: Studies in Paul's Letter to the Romans (2006).ver menos