This Psalm 135 setting means through repeated thanksgiving. The words give thanks for goodness, widen the address through God of gods and Lord of lords, then name the one who alone does great wonders. Each claim is answered by the same mercy refrain. The song is not arguing by variety. It is arguing by return: divine scale, goodness, and action all come back to one durable claim.

The music matters because it makes that claim communal. The voices do not sound like one private speaker explaining belief. They sound like a gathered body performing a phrase it has inherited. When the cycle returns at 2:11 and closes again at 3:14, the text is not adding new doctrine. It is making endurance happen a second time. Mercy endures here because the chant makes a community keep carrying it.