Ambrose of Milan

So, then, the Holy Spirit is the river, and the abundant river, which according to the Hebrews flowed from Jesus in the lands, as we have received it prophesied by the mouth of Isaiah. This is the great river that flows always and never fails. And not only a river, but also one of copious stream and overflowing greatness, as also David said: “The stream of the river makes glad the city of God.”60For neither is that city, the heavenly Jerusalem, watered by the channel of any earthly river, but that Holy Spirit, proceeding from the fount of life, by a short draught of whom we are satiated, seems to flow more abundantly among those celestial thrones, dominions and powers, angels and archangels, rushing in the full course of the seven virtues of the Spirit. For if a river rising above its banks overflows, how much more does the Spirit, rising above every creature, when he touches the low-lying fields of our minds, as it were, make glad that heavenly nature of the creatures with the larger fertility of his sanctification.
And let it not trouble you that either here it is said “rivers” or elsewhere “seven Spirits,” for by the sanctification of these seven gifts of the Spirit, as Isaiah said, is signified the fullness of all virtue; the Spirit of wisdom and understanding, the Spirit of counsel and strength, the Spirit of knowledge and godliness, and the Spirit of the fear of God. One, then is the river, but many the channels of the gifts of the Spirit. This river, then, goes forth from the fount of life.

But perhaps you will say: How can Christ be rich in poverty? Although my intelligence may fail me, divine assistance does not fail in the reading of the Scriptures, for the Apostle says: "For you know the grace of our Lord Jesus Christ, that being rich he became poor for your sakes; that through his poverty you might be rich." So what is this poverty that makes us rich? Let us consider it, let us focus on the sacred Sacrament itself. What can be purer and simpler than that? No one is drenched with the blood of bulls, as the sacrifices of the Gentiles are said to be; no sinner is washed with the blood of goats and rams (for no one is purified in this way; flesh is washed, not guilt diluted), but with water, as Isaiah says, with joy from the springs of the Savior; and a heavenly table is prepared before you, and what a splendid intoxicating cup it is! These are the riches of simplicity, in which is the precious poverty of Christ. Poverty is good in character; hence the Lord said: "Blessed are the poor in spirit." And in the Psalms we find that the Lord will save the humble in spirit. There is also abundant poverty in humble fellowship, if faith abounds. Hence the Apostle says: "And their deep poverty abounded in the riches of their simplicity."

Better is the foolishness that has eyes to see its own wounds than wisdom that does not have them. And therefore, with the gaze of his own foolishness, such a great king admits to being afflicted by miseries; so that he may find the remedy of repentance, which Judas, who possessed a field with the wages of iniquity, could not find. "I am afflicted and bowed down by miseries until the end; I go about in sorrow all day long." Until what end does he say he is bowed down? Is it the legitimate end of repentance? Or moreover, so that we may understand it mystically, until Christ, who is the end of the Law; who allowed himself to be scourged, allowed his body to be stoned to death? But those wounds emitted no smell of repentance, but rather the fragrance of all grace. Finally, death did not consume Him, as it does with other men; rather, the fountain of eternal life gushed forth, as Scripture teaches us, saying: "With joy you will draw water from the wells of salvation." Therefore, water sprang forth from His wound, so that we might drink salvation. All sinners of the earth will drink, so that they may cast off their sins. Consider each detail. Christ was afflicted with miseries in order to make blessed those who were in misery. Let no one call him who is just miserable, for he himself said: "You will make no one miserable." He was bent down so that we could be raised up; he was sad so that we could be made joyful; as it is written: "For if I cause you sorrow, who then will make me glad, unless the one who is made sad by me." Therefore, whoever is made sad by the Lord Jesus Christ, he himself makes Christ glad; and he himself is made joyful by Christ. Therefore, we also recognize that we must not be satisfied with superficiality. Let us bend until the end, that is, not only having faith in Christ, but also enduring our sufferings, and let us rejoice in our sufferings, just as Christ rejoiced in his sufferings. He took them upon himself for his servants, so let us undergo them for the Lord.

When the Lord Jesus redeemed the human race through obedience and restored justice, the serpent introduced sin through disobedience; we can estimate the extent of this vice, of which the author is the devil, whom the Prophet introduces saying: I will set my throne above the clouds, and I will be like the Most High. Therefore, since he is most wicked, he did not give honor to our Lord God; nevertheless, he educated worse disciples. For he exalted himself in such a way that he wanted to be equal and similar to the Most High: but his disciple, as signified by the Apostle, would be indignant to be considered equal and similar to God. For it is written: When the man of sin and son of perdition is revealed, who opposes and exalts himself above every so-called god. Therefore, the teacher considers himself similar, this one superior. And so the Lord said to his disciples: You will do greater things; so that to those whom the serpent had taken away more than he himself had lost, Christ would give greater things than he had done on earth. For he wanted to deceive the prince of the world in himself, to triumph in the disciples.