Shared ground
Psalm 67:4 links worldwide joy to God’s worldwide rule. The verse calls “the nations” to be glad and sing, and it gives a reason: God judges “the peoples” with equity and governs the nations across the earth. The basic picture is that God’s leadership is not narrow or tribal; it is meant to be good news for many peoples at once.
The terms for fairness and guidance matter. “Equity” points to straight, even-handed dealing rather than twisted outcomes. “Govern” adds the idea of ongoing direction, not only a single verdict. “Selah” pauses after these claims, giving space to weigh the connection between justice and shared joy.
Where interpretation differs (only where needed)
One question is what “judge” highlights here. Some readers take it mainly as God correcting injustice and setting things right. Others take it more broadly as God deciding cases and administering rule—still fair, but not focused only on punishment or reform.
A second question is how to hear “govern.” Some read it as direct rule over the nations. Others hear the word as “lead” or “guide,” emphasizing God’s wise direction rather than a picture of political control.
A third question is timing. The call to rejoice can be heard as celebrating what is already true about God’s rule, or as looking ahead to when that rule is fully recognized among the nations.
Why the disagreement exists
The verse uses compact poetry, so a few verbs carry a lot of meaning. Words like “judge” and “govern” can describe courtroom decisions, moral evaluation, public administration, or protective leadership. Also, the line about the nations rejoicing can fit either present worship language (“this is true now”) or hopeful language (“this will be openly seen”).
What this passage clearly contributes
Explicitly, the text claims that the nations’ joy is grounded in God’s fair judgment and wide-reaching governance. By inference, the verse presents justice as something that benefits more than one people-group: when rule is even-handed and guiding, it creates a basis for shared public happiness rather than fear or rivalry. It also places God—not any single nation’s ruler—at the center of the world’s moral order (compare Psalm 67:1–7).