Pure, Celestial, Transcendent, Glorious Fun!
Duty and morality are the language of “ought” and “must” that often run counter to desire. They shouldn’t, but they do. We are sinfully selfish creatures who must be told by God what is right and how we should live. But in heaven, where all sinful and selfish impulses will have been eradicated, desire and duty will converge. What we “ought” to feel and think and do will come spontaneously, as an expression of our deepest inner desires.
No one spoke to this more clearly than C. S. Lewis. Here and now, said Lewis, prayer is a “duty,” but will not be so in heaven. He explains:
“If we were perfected, prayer would not be a duty, it would be delight. Some day, please God, it will be. The same is true of many other behaviors which now appear as duties. . . . To practice them spontaneously and delightfully is not yet possible. This situation creates the category of duty, the whole specifically moral realm. . . . But . . . there is no morality in heaven. The angels never knew (from within) the meaning of the word ought, and the blessed dead have long since gladly forgotten it. . . . This also explains . . . why we have to picture that world in terms which almost seem frivolous. . . . We can picture unimpeded, and therefore delighted, action only by the analogy of our present play and leisure” (C. S. Lewis, Letters to Malcolm: Chiefly on Prayer [London: Geoffrey Bles, 1964], 147-48).
J. I. Packer concurs with Lewis:
“When we are resurrected in our finally perfect state, duty will be a word that we will not need. Thoroughgoing love (admiration, appreciation, valuation, gratitude, goodwill), both to our triune God and to all our glorified fellow sinners, will be the spontaneous, wholehearted, unqualified and indefatigable expression of what we now are. All the thoughts that pass through and come from our minds will have at their center praise to God, all the time and all the way. And it will be fun! – pure, celestial, transcendent, glorious fun. We will never have enjoyed anything so much” (Praying, [Downers Grove: IVP, 2006], 117).