I think you can believe from this addition to the stories that Malory is expressing those British longings for magic, healing, fairy, etc. And in doing so, he connects both Arthur and England with not just myth and legend but also with the hope and belief in something greater and more mysterious than ourselves. Anyone seeing the Christian elements here is absolutely right. The characters are abstractions in the guise of the concrete. These plays use simple action and are set up to tell a moral that will improve the audience.
Everyman is, of course, a character who represents humanity in general.
Man can take with him only what he has given , not what he has taken . The story evinces the strongest medieval faith in contemptus mundi and belief in the afterlife gained through good works alone. The story of Everyman was conventional in its own day as it is in ours, but it is total with particular skill, humor, and empathy that has made the play last for over five hundred years. He was canonized in 1935. The guide on this trip is Raphael Hythloday, who has discovered Utopia.