This passage ends with the word Selah. I always just passed this by, in the past. The idea, is NOT to just keep on, in this case singing, but to pause, and contemplate. OUR GOD THRU JESUS, HAS DELIVERED US FROM THE BONDAGE OF SIN. NOT THRU ANYTHING WE CAN DO, BU THROUGH THE WORK OF JESUS. WE ARE FREE, INDEED. MAY WE LIVE AS THOUGH WE BELIEVE THIS PROMISE.

bible.com/bible/100/psa.68.19.NASB1995