Demons No Power Over Pigs Or Us — We may also learn this from what befell the heard of swine. Wicked demons are cruel, mischievous, hurtful and treacherous to those who are in their power.
The fact clear proves this, because they hurried the swine over a precipice and drowned them in the waters. Christ granted their request that we might learn from what happened that their disposition is ruthless, bestial, incapable of being softened, and solely intent on doing evil to those whom they can get into their power.
If there is anyone among us who is wanton, swinish, filth loving, impure and willingly contaminated with the abominations of sin, God permits such a one to fall into power and sink into the abyss of damnation.
It will never happen that those who love Christ will become subject to them. It will never happen to us as long as we walk in his footsteps, avoid negligence in the performance of what is right, desire those things which are honorable and belong to the virtuous and praiseworthy lifestyle that Christ has marked out for us by the precepts of the Gospel.
From a homily of Saint Cyril of Alexandria
Courtesy of Holy Myrrh-Bearers Church