What is the "chorus" in Psalm 136 which is repeated in every verse?

Psalm 136 is like a lyrical tour through the attributes of God, enveloped in a spirit of gratitude. The unending refrain, "For his mercy endureth forever," serves a deeper purpose than mere repetition; it’s a rhythmic reminder of divine compassion that brings unity among worshipers. Each verse brings a specific aspect of God’s actions—creation, liberation from Egypt, and enduring kindness toward Israel—paired with this consistent echo that heartens the community.

Interestingly, the structure of repetition is not unique to this psalm. It plays a significant role in other majestic passages, such as the "Holy, Holy, Holy" recitations in Isaiah 6:3, emphasizing the holiness of God. In both instances, the repeated phrase strengthens a sense of shared experience among congregants, drawing them into a collective expression of reverence and acknowledgment of something far greater than themselves.

You may find it intriguing that this style of liturgy isn’t just an ancient practice. Modern hymns and church services frequently use refrains to mirror this call and response, further illustrating a timeless human inclination to express reverence through music.

Psalm 136 captures the essence of sensitivity, reminding us to remain focused on gratitude. Such insight into devotional practices of ancient times enriches our understanding, inviting us to cultivate a heart of thankfulness in our contemporary lives too. After all, mercy isn’t just an external truth but a catalyst for inner peace.