Augustine of Hippo

And first we have had to be persuaded how much God loved us, lest from despair we should not dare to look up to Him. And we needed to be shown also what manner of men we are whom He loved, lest being proud, as if of our own merits, we should recede the more from Him, and fail the more in our own strength. And hence He so dealt with us, that we might the rather profit by His strength, and that so in the weakness of humility the virtue of charity might be perfected. …

On The Trinity 4:1.2 ↗

Ambrose of Milan

Damasus cleansed not, Peter cleansed not, Ambrose cleansed not, Gregory cleansed not; for ours is the ministry, but the sacraments are yours. For human power cannot confer what is divine, but it is, O Lord, your gift and that of the Father, as you have spoken by the prophets, saying, "I will pour out of my Spirit on all flesh, and their sons and their daughters shall prophesy." This is that typical dew from heaven, this is that gracious rain, as we read: "A gracious rain, dividing for his inheritance." For the Holy Spirit is not …

On the Holy Spirit 1.18 ↗

Jerome

You will set apart a voluntary rain, O God, for your inheritance. He speaks of the law, which was given through Moses. And it was weakened, but you have perfected it. The law was weakened, because no one was able to fulfill it except the Lord, who said: "I have not come to abolish the law, but to fulfill it." And according to the apostle: "For what was impossible for the law, in that it was weakened, God sent his own Son," and the rest.

Homily 7, on Psalm 67 ↗