Behold, I send you forth as sheep in the midst of wolves: be therefore wise as serpents, and harmless as doves.
All Commentaries on Matthew 10:16 Go To Matthew 10
Theophylact of Ochrid
AD 1107
He armed them with miracles and made them confident of their means of sustenance by opening to them the doors of those who are worthy. Now He also tells them of the terrible things that will occur, thus showing His foreknowledge. He comforts them with the words "It is I." It is I, the Mighty One, He says, so you may take courage; you will not be overcome. He prepares them to undergo suffering. Just as it is impossible for a sheep in the midst of wolves not to suffer harm, so it is with you amidst the Jews. But should you suffer, do not become angry, for I want you to be as meek as sheep and in this very manner so to conquer.
He also wants the disciples to be wise. So that you might not imagine, hearing them referred to as sheep, that a Christian must be foolish, Christ says that he must also be wise, knowing how to act when surrounded by many enemies. For just as the serpent allows all the rest of its body to be struck but guards its head, so let the Christian give all of his belongings and even his body to those who would strike it; but let him guard his Head, which is Christ and faith in Him. And just as the serpent squeezes through a narrow hole and sheds its old skin, so too let us traverse the narrow way and shed the old man. But since a serpent is also poisonous, He commands us to be innocent, that is, sincere, guileless, and harmless as doves. For when the offspring of doves are taken from them and they are driven away, they fly back again to their masters. Be wise, then, as the serpent lest you be tricked in this life, but be blameless in all your ways; and as for harming others, be as the dove that is guileless.