Looking at Hebrews 2:11-12 and Psalm 22, the author shows how Jesus is the Psalmist who leads His church to sing about His work. The work of Jesus invokes gratitude and thankfulness in the believer's heart. Not only is the work of Jesus the reason for singing Psalms, but Jesus Himself joins His church in singing.
Source: New Horizons, 2014. 3 pages.