The interacting compatibility of these elements finds operational, but often paradoxical, expression in the Christian social counsel to be in the world but not of it.
The "being in" is certainly literal; the "not being of it" implies a religious-moral transcendence of the literal which transcendence can best be expressed in art by metaphor.
Malory's Morte Darthur, if one line of many might be pursued through the text, appears a novel of religious education.
"Ever since Malory's time poets and critics have regarded the Morte Darthur as a means of moral and spiritual perfection." While latterly, particularly with Vinaver, disagreement on this point has arisen, statement can nevertheless be textually substantiated that the Morte Darthur is an educative novel, in the widest sense religious.
Malory, in short, uses the tangibles believable to his reading public as broad metaphor for the intangibles he values religiously, both in doctrine and works.