Good Christian liturgy

That of course is the difference between liturgy and spontaneous worship. There is nothing wrong with spontaneous worship, just as there’s nothing wrong with two friends meeting by chance, grabbing a sandwich from a shop, and going off together for an impromptu picnic. But if the friends get to know one another better and decide to meet more regularly, they might decide that…a better setting for their friendship, and a way of showing that friendship in action, might be to take thought over proper meals for one another and prepare thoroughly. In the same way, 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 ultimately better way for the relationship to grow and at the same time a way of demonstrating what that relationship is all about.
— N. T. Wright, After You Believe: Why Christian Character Matters, (New York: HarperOne, 2010), 222.