Charles Koller continues his look at the basic appeals of Biblical preaching by his description of The Appeal to Duty.
Koller defines this as the “divine urg to do a thing because it is right, or to refrain from a thing because it is wrong.” Certainly no Biblical preacher would attempt to preach very long with making use of this very powerful appeal.
Koller notes of the use of “ought” in the Bible as examples of the appeal to duty. For example, “These ought ye to have done (Matthew 23:23).” Or “Ye ought to suppor the weak. (Acts 20:35).” Koller notes that Charles Finney used this appeal often to great affect.