Joel 2:15

Since, as I said, there are many kinds of proclamations, let us listen to the trumpet blast of the prophet: "Blow a trumpet in Zion, consecrate a fast." This is a warning trumpet, and it earnestly commands us that when we fast, we should do it in a holy manner, for God is holy and has pleasure in his holy people. Not everyone, however, who calls upon God honors him. Some defile him—although they don't actually defile him: that's impossible. But they do defile their own consciences concerning him. The apostle Paul tells us how it is that some people dishonor God: those who break the law dishonor God. So the prophet said, in order to point out those who pollute the fast, "Sanctify a fast." Many people, though they go through the motions of a fast, are still polluted in their hearts because they do evil against their brothers and sisters or because they dare to cheat. And many, if nothing else, think more highly of themselves than of their neighbors, thereby committing a great offense.

If these [vessels] were approved by the Lord it was at a time when the priests had to offer victims and when the blood of sheep was the redemption of sins. They were figures typifying things still future and were "written for our admonitions upon whom the ends of the world are come." But now our Lord by his poverty has consecrated the poverty of his house. Let us, therefore, think of his cross and count riches to be but dirt. Why do we admire what Christ calls "the mammon of unrighteousness"? Why do we cherish and love what it is Peter's boast not to possess? Or if we insist on keeping to the letter and find the mention of gold and wealth so pleasing, let us keep to everything else as well as the gold. Let the bishops of Christ be bound to marry wives, who must be virgins. Let the best-intentioned priest be deprived of his office if he bears a scar and is disfigured. Let bodily leprosy be counted worse than spots on the soul. Let us be fruitful and multiply and replenish the earth, but let us slay no lamb and celebrate no mystic Passover, for where there is no temple, the law forbids these acts. Let us pitch tents in the seventh month and noise abroad a solemn fast with the sound of a horn.

(Verse 15 and following) Blow the trumpet in Zion: sanctify a fast, call a solemn assembly, gather the people: sanctify the congregation, assemble the elders, gather the children and those who still nurse at the breast. Let the bridegroom come out of his chamber, and the bride out of her closet: between the porch and the altar let the priests, the ministers of the Lord, weep and say: Spare, O Lord (Vulgate adds, spare), your people, and do not let your heritage become a reproach, that the nations should rule over them. Why do they say among the peoples, 'Where is their God?' LXX: Blow the trumpet in Zion, sanctify a fast, call a solemn assembly, gather the people, sanctify the congregation, assemble the elders, gather the children and nursing babes; let the bridegroom go out from his chamber, and the bride from her dressing room. Between the vestibule and the altar, let the priests, the ministers of the Lord, weep and say: 'Spare Your people, O Lord, and do not give Your heritage to reproach, that the nations should rule over them. Why should they say among the peoples, 'Where is their God?'" } Still he exhorts them to repentance, before the enemy army comes. Above, he said: Blow the trumpet in Zion, wail on my holy mountain, and so on, because the day of the Lord is coming, the day of darkness and gloom, the day of clouds and whirlwinds, announcing to you a numerous and powerful people that will come, which will overthrow your possessions and cities. Now because I am kind and merciful, patient, and abundant in mercy, I again command and say: Blow the trumpet in Zion, and preach repentance to the peoples; sanctify the fasting, preach healing, or gathering, of which we have already spoken: gather the people, so that the one who had sinned by being dispersed, having been gathered, may cease to sin. Sanctify the Church so that no one in the Church is not holy, lest your prayers be hindered and a small amount of yeast corrupts the whole batch (I Cor. V). Unite or choose elders, so that it is not age but holiness that is chosen in them. Also gather little children and those nursing at the breast, so that there is no age that does not turn to the Lord. Little children and infants, of whom we read in the Psalms and in the Gospel: 'From the mouths of infants and nursing babies you have prepared praise' (Psalm VIII, 3; Matthew XXI, 16). Petrus says about those who…