Ps 96:1

“For if the earth has to suffer either joy or injury, it is simply on people's account, that they may suffer the joy or the sorrow through the events that happen to their dwelling place, whereby they will rather have to pay the penalty that, simply on their account, even the earth must suffer. When, therefore, God even threatens the earth, I would prefer saying that he threatens the flesh. So likewise, when he makes a promise to the earth, I would rather understand him as promising the flesh; as in that passage of David: "The Lord is King, let the earth be glad," meaning the flesh of the saints, to which appertains the enjoyment of the kingdom of God.”

“..."The Lord is King, let the earth be glad: yea, let the multitude of the isles be joyous" [Psalm 97:1]. It is so indeed, because the word of God hath been preached not in the continent alone, but also in those isles which lie in mid sea: even these are full of Christians, full of the servants of God. For the sea doth not retard Him who made it. Where ships can approach, cannot the words of God? The isles are filled. But figuratively the isles may be taken for all the Churches. Why isles? Because the waves of all temptations roar around them. But as an isle may be beaten by the waves which on every side dash around it, yet cannot be broken, and rather itself doth break the advancing waves, than by them is broken: so also the Churches of God, springing up throughout the world, have suffered the persecutions of the ungodly, who roar around them on every side; and behold the isles stand fixed, and at last the sea is calmed.”

“Same. Huic. The title is the same as usual in the Septuagint. (Menochius) — It occurs not in Hebrew. The psalm may refer to David’s establishment on the throne, after the death of Saul, or Absalom, or to the return from captivity, and to the first and second coming of Christ. (Calmet) — This last seems to be the most literal sense. (Berthier) — To him. Christ’s body on the third day, and many souls were restored to life. [Matthew xxvii. 52.] — Islands. We have great reason to rejoice in being educated in the true faith, and we may hope that the Catholic religion will once more flourish in these isles. (Worthington) — The Son of man shall have dominion over all, Daniel vii. 14. His Church is persecuted, as the waves beat against an island. (Eusebius) (Calmet)”

“We have here nothing but echoes of the older literature: Psa 97:1, cf. Isa 42:10-12; Isa 51:5; Psa 97:2, cf. Psa 18:10, Psa 18:12; Psa 97:2 = Psa 89:15; Psa 97:3, cf. Psa 50:3; Psa 18:9; Psa 97:3, cf. Isa 42:25. Beginning with the visible coming of the kingdom of God in the present, with מלך ה the poet takes his stand upon the standpoint of the kingdom which is come. With it also comes rich material for universal joy. תּגל is indicative, as in Psa 96:11 and frequently. רבּים are all, for all of them are in fact many (cf. Isa 52:15). The description of the theophany, for which the way is preparing in Psa 97:2, also reminds one of Hab. 3. God's enshrouding Himself in darkness bears witness to His judicial earnestness. Because He comes as Judge, the basis of His royal throne and of His judgment-seat is also called to mind. His harbinger is fire, which consumes His adversaries on every side, as that which broke forth out of the pillar of cloud once consumed the Egyptians.”