The Chronicles of Narnia is an allegorical tale that is based heavily on Christian stores of morality, creation, and history. Lewis took a lot of ideas from other historical tales, such as the stories of King Arthur and mythology, to create characters and themes—but the overarching concept is overwhelmingly Christian in nature.

Salvation

The idea of salvation is most notable in the story of Edmund Pevensie. Acting as an enemy to Aslan, he sells out his family to the White Witch for a chance at being greater than his brother and sisters and to eat some Turkish Delight. To secure his safe return, Aslan willingly sacrifices his own life in exchange, which leads the White Witch to think she has successfully killed the God of Narnia.

Digory Kirk and Eustace Scrubb are other characters with notable salvation experiences over the course of the narrative. Digory must make the right decision to not partake in the fruit but instead take it to heal his mother, and he is commended by Aslan. Eustace's heart changes after he spends several weeks in the form of a dragon and Aslan heals him, leading him to be much kinder and gentler.

Courage

Aslan constantly encourages the children to tackle the tasks ahead of them, as when Eustace and Jill are in Aslan's land. Aslan ensures that they listen to his advice and the steps they need to complete, and then he breathes on the two of them to give them the courage they need. Later, after returning, they have failed in their courage but succeeded in the journey, for which Aslan commends them. But he also reprimands them, saying they need to be more bold and courageous, particularly in light of the fact that, since Aslan is with them, they cannot fail.

Faith

The children and characters are asked to have faith in Aslan many times throughout the story. Digory is told to have faith that Aslan will heal his mother, Lucy and Susan are told to have faith that Aslan will take care of them in spite of his death, and Eustace and Jill are told to have faith that Aslan will rescue Rilian and get them safely out of the Underground World.