There are a lot of themes in this book. Each reader has to think for him/herself about which are the main ones. Here are a few themes:
- Maturation -- Digory matures a great deal over the course of the book. He starts out impulsive and selfish, but grows as the book goes on.
- Difference between what's good and what's practical -- Jadis and Uncle Andrew only want what is useful and do not understand what is good.
- Creation and destruction -- this is especially seen in the destruction of Charn and the creation of Narnai.
- Forgiveness -- Digory is forgiven even though he harms Narnia by bringing Jadis there.