John MacArthur (1939-2025) is the late pastor-teacher of Grace Community Church in Sun Valley, California, where he served since 1969. He is known around the world for his verse-by-verse expository preaching and his pulpit ministry via his radio program, Grace to You. He wrote or edited nearly four hundred books and study guides. MacArthur also served as chancellor emeritus of the Master's Seminary and Master's University.

Abner Chou (ThD, The Master's Seminary) is president and John F. MacArthur endowed fellow at the Master's University. He has taught classes in Bible and theology and is a plenary speaker and guest lecturer. He and his wife, Johanna, have four children.