Psalms 89:9

...For ye have heard, like men accustomed to the watering of the clouds of God, "Thy truth" then "is in the circuit of Thee." But when without persecutions, when without opposition, since it is said, that "He was born for a sign which shall be spoken against"? [Luke 2:34] Since then that nation, where Thou didst deign to be born, and to dwell, was as a land separated from the waves of the heathen, so that it appeared dry and ready for watering with rain, while the rest of the nations were as a sea in the bitterness of their sterility; what do Thy preachers who scatter Thy truth in circuit of Thee, when the waves of that sea rage furiously? "Thou rulest the power of the sea" [Psalm 89:9]. For what was the result of the sea raging thus, but the day which we are now keeping holy? It slew Martyrs, scattered seeds of blood, the harvest of the Church sprang up. Safely then let the clouds go forth: let them diffuse Thy truth in circuit of Thee, let them not fear the savage waves. "Thou rulest the power of the sea." The sea swells, buffets, and roars: but "God is faithful, who will not suffer you to be tempted beyond what ye are able:" [1 Corinthians 10:13] and so, "Thou stillest the waves thereof when they rise."

Thou rulest the raging of the sea,....

To illustrate His power and faithfulness examples are cited from history. His control of the sea (the most mighty and unstable object in nature), and of Egypt (Ps 87:4), the first great foe of Israel (subjected to utter helplessness from pride and insolence), are specimens.

Thou rulest the raging of the sea. Always, even in the hour of ocean's maddest fury, the Lord controls it. At the Red Sea the foaming billows saw their God and stood upright in awe. When the waves thereof arise, thou stillest them. None else can do this; to attempt it would be madness, but the Lord's "hush" silences the boisterous storm. So did the Lord's Anointed calm the storms of Galilee, for he is Lord of all; so also does the great Ruler of Providence evermore govern the fickle wills of men, and quiet the tumults of the people. As a mother stills her babe to sleep, so the Lord calms the fury of the sea, the anger of men, the tempest of adversity, the despair of the soul, and the rage of hell. "The Lord sitteth upon the floods; yea, the Lord sitteth King for ever", and in all his ruling and over ruling he has respect unto his covenant; therefore, although our house be not so with God as our hearts would wish, yet we will rejoice in his covenant ordered in all things and sure, and delight in him as all our salvation and all our desire.

Thou rulest the raging of the sea - Whoever has seen the sea in a storm, when its waves run what is called mountain high, must acknowledge that nothing but omnipotent power could rule its raging. When the waves thereof arise, thou stillest them - Thou governest both its flux and reflux. Thou art the Author of storms and calms. There may be a reference here to the passage of the Red Sea, and the strong wind that agitated its waves at that time; as the next verse seems to indicate.