2 “And when they were departed, behold, an angel appears to Joseph in a dream, saying, Arise, and take the young Child and His mother, and flee into Egypt.”
There is something here worth inquiring into, both touching the magi, and touching the Child; for if even they were not troubled, but received all with faith, it is worthy of examination on our part, why they and the young Child are not preserved, continuing there, but they as fugitives go into Persia, He with His mother into Egypt. But what? Should He have fallen into the hands of Herod, and having fallen, not have been cut off? Nay, He would not have been thought to have taken flesh upon Him; the greatness of the Economy would not have been believed.
For if, while these things are taking place, and many circumstances are being ordered mysteriously after the manner of men, some have dared to say that His assumption of our flesh is a fable; in what degree of impiety would they not have been wrecked had He done all in a manner becoming His Godhead, and according to His own power?
As to the wise men, He sends them off quickly, at once both commissioning them as teachers to the land of the Persians, and at the same time intercepting the madness of the king, that he might learn that he was attempting things impossible, and might quench his wrath, and desist from this his vain labor. For not alone openly to subdue His enemies, but also to deceive them with ease, is worthy of His power. Thus, for example, He deceived the Egyptians also in the case of the Jews, and having power to transfer their wealth openly into the hands of the Hebrews, He bids them do this secretly and with craft; and this surely, not less than the other miracles, made Him an object of terror to His enemies. At least, they of Ascalon, and all the rest, when they had taken the ark, and being smitten, did after that devise their countrymen not to fight, nor to set themselves against Him, with the other miracles brought this also forward, saying, “Wherefore harden ye your hearts, as Egypt and Pharaoh hardened? When He had mocked them, did He not after that send forth His people, and they departed?” Now this they said, as accounting this fresh one not inferior to those other signs that had been done openly, towards the demonstration of His power, and of His greatness. And the like ensued on this occasion too; a thing sufficient to astonish the tyrant. For consider what it was natural for Herod to feel, and how his very breath would be stopped, deceived as he was by the wise men, and thus laughed to scorn. For what, if he did not become better? It is not His fault, who marvellously ordered all this, but it is the excess of Herod's madness, not yielding even to those things which had virtue to have persuaded him, and deterred him from his wickedness, but going on still further, to receive a yet sharper punishment for folly so great.
Source: Homilies on the Gospel of St. Matthew (New Advent)