The May 1987 edition of National Geographic included a feature about the arctic wolf. Author L. David Mech described how a seven-member pack had targeted several musk-oxen calves who were guarded by eleven adults. As the wolves approached their quarry, the musk-oxen bunched in an impenetrable semicircle, their deadly rear hooves facing out, and the calves remained safe during a long standoff with the enemy. But then a single ox broke rank and the herd scattered into nervous little groups. A skirmish ensued, and the adults finally fled in panic, leaving the calves to the mercy of the predators. Not a single calf survived.
Paul warned the Ephesian elders in Acts 20 that after his departure wolves would come, not sparing the flock. Wolves continue to attack the church today but cannot penetrate and destroy when unity is maintained. When believers break ranks, however, they provide easy prey.