Probably the biggest christian theme in Narnia is probably that Aslan represents God/Jesus/Holy Spirit. In The Horse and his Boy, Aslan shows mercy and grace on Rabadash by constantly warning him to repent before he turned into a donkey. Another thing is that they call all of the humans sons of Adam and of daughters of Eve. Another big thing is that Aslan created the world of Narnia (and the surrounding countries) by simply singing. Another thing is that Aslan died on the stone table just like Jesus died on the cross to save us. One more thing is that Aslan is on Narnia as a lion and Jesus came to earth as a human. They can also both do anything that they want to like when Aslan turned into a house cat and Jesus feed the five thousand. They are both amazing!!! The final thing that I am going to say is that like shown in both The Horse and his Boy and the bible, those with greed, pride, and arrogance who don’t repent to God and won’t believe in Jesus are punished like Rabadash was, but believe in the success of Jesus Christ at the cross are lifted up and granted internal life in heaven with Jesus!