Ignatius of Antioch

These things I write to you, thou new olive-tree of Christ, not that I am aware you hold any such opinions, but that I may put you on your guard, as a father does his children. Beware, therefore, of those that hasten to work mischief, those "enemies of the cross of Christ, whose end is destruction, whose glory is in their shame." Beware of those "dumb dogs," those trailing serpents, those scaly dragons, those asps, and basilisks, and scorpions. For these are subtle wolves, and apes that mimic the appearance of men.