Augustine of Hippo
He accomplished it, and there is clear evidence of His work. He established the mountains through His might and sent them forth as heralds: empowered, He instilled faith in believers, causing the sea to be agitated, the world to tremble, and subsequently to pursue His faithful. Empowered: that which disturbs the depths of the sea. He did not merely trouble the sea; rather, it is the depths of the sea that He moved. The depths represent the hearts of the wicked. Just as the depths stir up everything from below and serve as the foundation for all things, so too have the various efforts to persecute the Church emerged from this place of corruption. If not for the seed of wickedness within the heart, such resistance would not have risen against Christ.
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The depths He stirred may have been so that He might render them desolate: for certain wicked individuals, He caused the sea to become empty from the depths, transforming it into a barren wasteland. Another psalm proclaims, “This sea turneth into dry land.” All those who are wicked and unbelieving, once seen as the sea, became as dry ground; initially marked by salt waves, but ultimately yielding the fruits of righteousness. What agitates the depths of the sea is the tumult of its waves—who can withstand it? Who will endure this? What person can stand firm against the clamor of the ocean's waves, or the decrees of the world's authorities? Yet, how do they endure? It is because He fortifies the mountains with His power. Thus, in addressing who may withstand such trials, he acknowledges: we could not endure those persecutions in our own strength if He had not bestowed His power upon us.