Eyes Trained for Sin

Peter’s portrait of the false teachers has grown steadily darker since the beginning of 2 Peter 2, and in today’s verse it reaches a point of concentrated intensity (v. 14). These men do not merely stumble into sin on occasion, as all fallen creatures do; they have cultivated it. Their eyes are “full of adultery,” meaning that they cannot look at another person without seeing an opportunity for sexual transgression. They are “insatiable for sin,” having a hunger for transgression that feeding only intensifies. Their hearts have been “trained in greed” the way that an athlete trains his body for competition. Sin is not their weakness; it is their discipline.

False doctrine and false living are inseparable in Peter’s analysis. These men did not arrive at their theological errors through careful exegesis that happened to go astray; their theology was shaped by their appetites. They denied the return of Christ in judgment because judgment would condemn their behavior. They preached freedom from moral restraint because restraint interfered with their desires. Their doctrine served their flesh. Matthew Henry observes that such teachers “make a trade of sin, and set their minds to it as their business,” so that wickedness becomes not an occasional lapse but a settled way of life.

This pattern remains disturbingly common. Throughout church history, theological innovations that loosen moral boundaries have frequently been advanced by leaders whose personal conduct required such loosening. The history of heresy is, in no small part, a history of desire masquerading as doctrine.

Peter also notes that these men “entice unsteady souls.” The word for “entice” carries the image of baiting a trap, and the “unsteady” stand in deliberate contrast to the “established” believers of 1:12, those who are grounded in the truth. False teachers do not typically target mature, well-grounded believers but seek out those who are young in the faith, uncertain in their convictions, or vulnerable because of personal struggles. This is predatory behavior, and Peter condemns it in the strongest terms, calling these teachers “accursed children,” people who stand under divine condemnation. The church must take seriously its responsibility to protect the vulnerable by providing sound teaching and faithful mentoring to newer believers, for strong discipleship is one of the most effective defenses against the influence of false teaching.