You can practice this week’s singing here (to Ode to Joy)

From the ESV Study Bible

[Psalm 93 is a hymn] of praise for divine kingship, namely, God’s kingly rule over creation. The idea of God as universal king is of course rooted in the creation account; the specific words first appear in Ex. 15:18. When the OT speaks of the kingship of God, it can mean his kingship over all creation, or it can mean God’s acknowledged kingship over his people (1 Sam. 8:7; 12:12–15); the NT expression “kingdom of God” focuses on the way God ministers to and governs his people through the heir of David. In each case, it is important to discern which of these is primarily in view. The psalms of divine kingship especially celebrate God’s kingship over his creation. Even though it is important to distinguish these ideas, one should not separate them: it is Israel’s great privilege that the God who rules over them is the universal Creator and Lord, who one day will rule all nations. Psalm 93 ends with this experience of wonder. The conviction that God reigns is the ultimate antidote to doubt and despair (cf. 89:38–51).

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To an Israelite, the raging sea (also called floods and many waters) was the most vivid emblem of uncontrollable chaos. This section insists that the divine king is mightier than even that.

From the Archaelogical Study Bible

The status of king among the gods was often associated with imposition of order through victory over the powers of chaos, generally depicted as the sea. The psalmist here draws on this common cultural stock of religious language to proclaim Yahweh as the true King over all that exists.

From the ESV Gospel Transformation Study Bible

The believer’s great comfort is that God is a benevolent king. As sustainer of the universe, God is all-powerful, unchangeable, and eternal. His perfect sovereignty joined with absolute goodness answers every need for his people’s sustenance (vv. 1–2; Phil. 4:19–20). Not only so, but perfect sovereignty joined to passionate love makes him triumphant over his children’s enemies (Ps. 93:3–4; Rev. 11:16–18). No force of nature, nations, or culture can threaten the eternal security of believers (Rom. 8:38–39).

The eternality of God’s rule pointed the Old Testament saint forward to Christ (Ps. 93:2; Heb. 1:10–12). Calling his subjects “friends” not “servants,” Christ in his eternal kingdom provides security, which fosters loving familiarity and freedom (John 15:15; 8:36).

Something for Further Study

The Bible Project’s recent podcast series on ancient cosmology has some interesting background on how the Bible uses and adapts the assumptions of ancient cultures to talk about God, especially with respect to “the waters” as a picture of nothingness, or non-creation. For a shorter look at this question, see this Gospel Coalition article.

A Few Things to Listen To