A New Song–from Mourning to Rejoicing (vv. 11-12). Seven times in the psalm David wrote “thou hast” (vv. 1-3, 7, 11), bearing witness to the strong and gracious hand of the Lord working on his behalf. Even God’s chastening of David was an expression of His love (Heb. 12:1-11). Once David knew he was forgiven and accepted, he moved from the funeral to the feast. He took off the sackcloth of sadness and put on the garments of gladness. In Scripture, a dramatic alteration of one’s life was often marked by a change of clothing (Gen. 35:2; 41:14; 45:22; Ex.19:10, 14; 2 Sam. 12:20; Luke 15:22). “My glory” means “my heart, my soul.” David was singing to the Lord from the depths of his being. He realized that he would be singing praises to God forever (v. 12), so he wanted to start getting ready now! Every difficult experience of life–and David had many of them–is an opportunity to have a “pity party” or attend a rehearsal for singing in the choirs of heaven! We have a lifetime of grace (v. 5) to prepare us for an eternity of glory.