What is the theme in Le Cid by Pierre Corneille?

Love is major theme in the story, and there are many kinds of love displayed throughout. First there is the love of Rodrigue for his father. Rodrigue is willing to sacrifice his own love for Chimene in order to avenge his father. The love between Rodrigue and his father is strong, but it is not as deep as Rodrigue's love for Chimene. And yet Rodrigue is willing to lose Chimene in order to protect his father.