14 All these things we were. But “the earnest” filled the whole world. And when I say the whole I mean all which the sun shines upon, sea, islands, mountains, valleys, and hills. Paul went hither and there, like some winged creature, with one mouth only contending against the enemy, he the tentmaker, who handled the workman's knife and sewed skins together: and yet this his craft was no hindrance to his virtue, but the tentmaker was stronger than demons, the uneloquent man was wiser than the wise.
Whence was this? He received the earnest, he bore the signet ring and carried it about. All men saw that the King had espoused our nature: the demon saw it and retreated, he saw the earnest, and trembled and withdrew: he saw but the Apostle's garments and fled. O the power of the Holy Spirit. He bestowed authority not on the soul, nor on the body, but even on raiment; nor on raiment only but even on a shadow. Peter went about and his shadow put diseases to flight, and expelled demons, and raised the dead to life.
Paul went about the world, cutting away the thorns of ungodliness, sowing broadcast the seeds of godliness, like an excellent ploughman handling the ploughshare of doctrine. And to whom did he go? To Thracians, to Scythians, to Indians, to Maurians, to Sardinians, to Goths, to wild savages, and he changed them all. By what means? By means of “the earnest.” How was he sufficient for these things? By the grace of the Spirit. Unskilled, ill-clothed, ill-shod he was upheld by Him “who also has given the earnest of the Spirit.”
Therefore he says “and who is sufficient for these things? But our sufficiency is of God, who has made us sufficient as ministers of the new Testament, not of the letter but of the Spirit.” Behold what the Spirit has wrought: He found the earth filled with demons and He has made it heaven. For meditate not on present things but review the past in your thought. Formerly there was lamentation, there were altars everywhere, everywhere the smoke and fumes of sacrifice, everywhere unclean rites and mysteries, and sacrifices, everywhere demons holding their orgies, everywhere a citadel of the devil, everywhere fornication decked with wreaths of honour; and Paul stood alone.
How did he escape being overwhelmed, or torn in pieces? How could he open his mouth? He entered the Thebaid, and made captives of men, He entered the royal palace, and made a disciple of the king. He entered the hall of judgment, and the judge says to him “almost you persuade me to become a Christian,” and the judge became a disciple. He entered the prison, and took the jailor captive. He visited an island of barbarians, and made a viper the instrument of his teaching. He visited the Romans, and attracted the senate to his doctrine.
He visited rivers, and desert places in all parts of the world. There is no land or sea which has not shared in the benefits of his labours; for God has given human nature the earnest of His signet, and when He gives it He says: some things I give you now, and others I promise. Therefore the prophet says concerning her “The queen stood upon your right hand in a vesture woven with gold.” He does not mean a real vesture, but virtue. Therefore the Scripture elsewhere says “How camest thou in hither not having a wedding garment?” so that here he does not mean a garment, but fornication, and foul and unclean living.
As then foul raiment signifies sin, so does golden raiment signify virtue. But this raiment belonged to the king. He Himself bestowed the raiment upon her: for she was naked, naked and disfigured. “The queen stood on your right hand in a vesture woven with gold.” He is speaking not of raiment but of virtue. Observe: the expression itself has great nobility of meaning. He does not say “in a vesture of gold” but “in a vesture woven with gold.” Listen intelligently. A vesture of gold is one which is gold throughout: but a vesture woven with gold is one which is partly of gold, partly of silk.
Why then did he say that the bride wore not a vesture of gold, but one woven with gold? Attend carefully. He means the constitution of the Church in its varied manifestations. For since we do not all belong to one condition of life, but one is a virgin, another a widow, a third lives a life of devotion— so the robe of the Church signifies the constitution of the Church.
Source: Second Homily on Eutropius (After His Captivity) (New Advent)