Our Savior’s passion is a healing remedy for us, as the prophet teaches when he cries out: He bears our sins and suffers pain for us, and we esteemed him stricken, smitten by God and afflicted. But for our sins he was wounded, for our iniquities he was bruised; upon him fell the chastisement that brought us peace, and by his wounds we are healed. We had all gone astray like sheep, and therefore he was led like a lamb to the slaughter, and was dumb like a sheep before its shearer.When a shepherd sees that his sheep have scattered, he keeps one of them under his control and leads it to the pastures he chooses, and thus he draws the other sheep back to him by means of this one. And so it was when God the Word saw that the human race had gone astray: he took the form of a slave and united it to himself, and by means of it won over the whole race of men to him, enticing the sheep that were grazing in bad pastures and exposed to wolves, and leading them to the pastures of God.
From a treatise On the Incarnation of the Lord by Saint Theodoret of Cyr, bishop