Good Christian liturgy is friendship in action, love taking thought, the covenant relationship between God and his people not simply discovered and celebrated like the sudden meeting of friends, exciting and worthwhile though that is, but thought through and relished, planned and prepared -- an ultimatley better way for the relationship to grow and at the same time a way of demonstrating what the relationship is all about.
...Good liturgy is also eager to discover better and better ways of singing and praying Psalms together, so that they come to be "second nature" within the memory, imagination, and spirituality of all the worshipping faithful, not just of a few musically minded leaders.1
1. N.T. Wright, After You Believe: Why Christian Character Matters [Harper One: New York, NY; 2010] pp. 222-223