Ezra 6:22

They celebrated the feast of unleavened bread for seven days, etc. For this is the greatest joy of the righteous, both in this age and in the future, that the work of the Church is complete, with even the Gentiles who once resisted being converted, aiding its state and confirming peace of the Christian Church's religion throughout the entire world. Thus far, it is written about the return from Babylon to Jerusalem of the people who had been taken captive; the return of the vessels that had been taken away; the restoration and dedication of the temple that had been burned; the celebration of the festivals, and the singing of the songs of the Lord, which could not be sung in a foreign land, under the leaders Zerubbabel and Joshua. All these things contain one and the same knowledge of human salvation in Christ, both those who came into the world with the sin of the first transgression, purified by the sacraments of faith, are saved; and those who corrupted the faith they had received by sinning, repent and return to their senses, and both, through one and the same Savior, the true king and priest, celebrating as if the most blessed Passover, pass from this world to the Father, from death to life. Truly, because the temple was burned and the city of Jerusalem destroyed, the holy Scriptures that were kept there were also destroyed by the hostile calamity, and these, by the mercy of the Lord and his return to his people, had to be restored; so that, having restored the buildings that had been torn down, they would have something from which they, being admonished, might learn to be restored inwardly in the faith and love of their Creator. Hence it well follows:

And they kept the Feast of Unleavened Bread, etc. The Apostle teaches us how we ought to keep this feast spiritually, saying: "Let us therefore feast not with the old leaven, nor with the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth" (1 Cor. 5). This is to be observed for seven days; because throughout all this world's time, which runs for as many days, we ought to lead our life in sincerity and truth, indeed in the sacrifices and holocausts of all good works. And because our Lord, at the time of the Passover, conquered death, tasted momentarily with the eternal power of resurrection; the celebration of the Passover may be referred typologically to the time of our resurrection; so that the building of the temple designates the present state of the Holy Church, the dedication signifies the future life, which happens in the exultation of the holy souls, when they leave the body. The sacrifice of the Passover hints at the glory of the resurrection, when all the elect, no longer believing in the sacrament, but seeing in reality and truth, will be refreshed by the flesh of the spotless Lamb, that is, of our God and Lord. Hence, in this Passover, it is stated that all the priests and Levites, the entire assembly of the people, all who had flocked to them from the nations, were pure, as if they had all attended as one; for then the Lamb of God truly takes away the sins of the world. And as the Apostle John says: "The blood of Jesus, the Son of God, cleanses us from all sin" (1 John 1). Then there will be true unity when God will be all in all (1 John 1; 1 Cor. 15). Then the true feast of unleavened bread will be celebrated in joy, when no leaven of malice or wickedness remains in the elect, and all will cling to the divine vision in truth and sincerity of heart. And this not in the seven days of the passing world, but in the one day of everlasting life in the courts of the Lord, which is better than thousands in the light of the Holy Spirit, whose sevenfold grace the prophet commends to us (Ps. 84).