What do you think of when you hear the word “heresy”? Given our responsibility to defend the faith, as well as to speak truthfully about one another, Dr. Justin Holcomb talks about how important it is that we not misuse the word “heresy” or “heretic.” He also discusses the important differences between heresy, heterodoxy and those secondary matters we can dispute within the church without sacrificing our unity. To illustrate, he introduces us to Marcion, one of the church’s earliest heretics, and talks about how dualism still affects the church today. Tradition can be a valuable protection against false teaching like the kind of dualism that separates ministries of word and deed.