A former pastor, Dr. Aldred Genade currently teaches New Testament at a South African university. He focuses on the Pastoral Letters. He is the developer of the popular workshop, seminar and webinar series, The Persuasive Preacher. When he grows up he wants to play guitar like Joe Pass. Always a student.
In the Letter to Titus, Paul describes a kind of preacher who practices "worthless preaching"; literally teaching "non-things", Read: nonsense for the sake of "sordid gain" (read, "Mula", tsha-ching! $ and R). Don't be one of those. God did not leave us without directives on what constitutes legitimate preaching.