The main objective is the haggadah shel Pesach. Our chachamim have created the path of how to discuss yetzias Mitzrayim. Naturally, it brings with it emunah, as we discuss the nissim that Hashem did for us.
I make sure to discuss mesorah as well, that the Seder is something that has been made since the night of makkos bechoros, and unlike any other religion it is a story that is handed down from generation to generation.