Though the waters thereof roar and be troubled, though the mountains shake with the swelling thereof. Selah.
Read Chapter 46
Augustine of Hippo
6. "The waters thereof roared, and were troubled" (ver. 3): when the Gospel was preached, "What is this? He seemeth to be a setter forth of strange gods:" this the Athenians; but the Ephesians, with what tumult would they have slain the Apostles, when in the theatre, for their goddess Diana, they made such an uproar, as to be shouting, "Great is Diana of the Ephesians!" Amidst which waves and roaring of the sea, feared not they who to that refuge had fled. Nay, the Apostle Paul would enter in to the theatre, and was kept back by the disciples, because it was necessary that he should still abide in the flesh for their sakes. But yet, "the waters thereof roared, and were troubled: the mountains shook at the mightiness thereof." Whose might? The sea's? or rather God's, of whom was said, "refuge and strength, a helper in tribulations, which have found us out too much?" For shaken were the mountains, that is, the powers of this world. For one thing are the mountains of God, another the moun...
Their. Hebrew, St. Ambrose, read, "its. "(Calmet)
Both sea and land may be in confusion; we shall fear nothing, having God for our protector. (Haydock)
Though many and noble personages have revolted from the faith in England, yet the Catholic Church will never fail, (Worthington) even if it should in these islands. (Haydock) ...