This point is acknowledged in a praise chorus like “Let’s forget about ourselves, and magnify the Lord, and worship him.” The trouble is that after you have sung this repetitious chorus three or four times, you are no farther ahead. The way you forget about yourself is by focusing on God–not by singing about doing it, but by doing it. There are far too few choruses and services and sermons that expand our vision of God–his attributes, his works, his character, his words. Some think that corporate worship is good because it is lively where it had been dull. But it may also be shallow where it is lively, leaving people dissatisfied and restless in a few months’ time. Sheep lie down when they are well fed (cf. Ps 23:2); they are more likely to be restless when they are hungry. “Feed my sheep,” Jesus commanded Peter (John 21); and many sheep are unfed. If you wish to deepen the worship of the people of God, above all deepen their grasp of his ineffable majesty in his person and in all his works.
-D. A. Carson, Worship by the Book, 31.