Belief is such a huge theme in fantasy high, not even just in the sense of Kristen's religious belief. Like yes there's that, there's Helio and Yes! and Cassandra and her doubt and her struggle to believe that something/someone is really there looking out for her, and there's the way she believes in her friends and herself in the meantime (healing Riz and trusting him/her friends to save her in Sylvaire, her philosophers teaching her critical thinking so she can trust her own judgement) but there's also like. Spring break I believe in you, and the way Bill's belief in Fabian's ability to write his name on the face of the world shaped him as a person. There's also Adaine saying to Aelwyn "I believe in you sometimes" after saying she doesn't believe in gods. There's Fig, and German shepherd mode, saying "I've got you. Believe in me. Trust me and I will look out for you" and struggling to sign an agreement with herself because she doesn't believe in herself, but believing that Gilear is something special. There's Riz, and his belief, his absolute conviction that his friends will always be there for him, like when he decides to save his dad in hell and the final thing he said when his decision was made was "my friends will find me". It's Gorgug, not knowing where his friends are in the forest but believing that they'll make it to him, leaving a message behind to help them get there.