Richard J. Gibson (PhD, Macquarie University) is Principal of Brisbane School of Theology in Australia. He has had twenty years of experience of teaching Greek, New Testament, church history and preaching at Moore Theological College in Sydney, Australia.

Constantine R. Campbell (PhD, Macquarie University) is a New Testament scholar, author, musician, and documentary host, and lives in Canberra, Australia. He was formerly professor of New Testament at Trinity Evangelical Divinity School and is the author of several books, including Paul and Union with Christ, Advances in the Study of Greek, Basics of Verbal Aspect in Biblical Greek, Keep Your Greek, Outreach and the Artist, and 1, 2 & 3 John in The Story of God Bible Commentary series.