Augustine of Hippo
The title of this psalm carries the message, "In the end is the song of the psalm of the resurrection." When the theme of the end arises in the recitation of the psalms, interpret it in light of Christ: as the Apostle states, "For the end of the law is Christ, unto righteousness to every one that believeth." (Rom. 10:4) Hence, as the Resurrection is celebrated here, listen closely to whose Resurrection it is, as revealed by His own will. The Resurrection that we Christians acknowledge has already occurred in our Head, and it is destined to happen for the members as well. Christ is the Head of the Church (Col. 1:18), and the Church comprises the members of Christ. What transpires in the Head will also be fulfilled in the Body.
Read more (309 words)
This is our assurance; for this we hold as true, enduring and persevering through the profound corruption of this world, with hope offering comfort until that hope becomes manifest.
The Jews indeed possessed a belief in the resurrection of the dead, anticipating that they alone would be granted eternal life through the workings of the Law and the justifications found in the Scriptures that were theirs exclusively, not shared with the Gentiles. Christ's crucifixion brought about a partial blindness to Israel so that the fullness of the Gentiles might come in (Rom. 11:25), as the Apostle notes. The promise of the resurrection is now extended to the Gentiles who have faith in Jesus Christ, affirming His resurrection. Thus, this psalm challenges the arrogance and pride of the Jews, bringing comfort to the Gentiles who are called to share in the same hope of resurrection.
From this point, the call is made, "Rejoice in God, all the earth" (Psalm 64:1). This message extends beyond Judea. Observe, brothers, how the universal nature of the Church unfolds throughout the world: do not weep only for the Jews, who resented the Gentiles for their grace, but lament even more for the heretics. If mourning is warranted for those who do not assemble, how much greater is the sorrow for those themselves who divide from the gathered community? "Rejoice in God, all the earth." What does it mean to rejoice? Let your voice resound in joy if you cannot find the words. Rejoicing transcends mere words; it is an expression of the heart, manifesting joy in a manner that defies description. "Rejoice in God, all the earth; let not any portion remain isolated in joy, but let the entire earth celebrate, and let the Catholic Church rejoice." The Catholic Church encompasses all; one who separates themselves from the whole must lament rather than rejoice.