Bobby Jamieson is a Ph.D. student in New Testament at the University of Cambridge. He previously served as assistant editor for 9Marks and is the author, most recently, of Going Public: Why Baptism Is Required for Church Membership (B&H, 2015). Jonathan Leeman (Ph.D., University of Wales), an elder at the Capitol Hill Baptist Church in Washington, DC, is the editorial director at 9Marks and is the author, most recently, of Don’t Fire Your Church Members: The Case for Congregationalism (B&H, 2015).