What are the motifs in That Hideous Strength by C. S. Lewis?

Christian conversion is always a recurring idea in the story. There are many Biblical allusions within this work, and many of them center on the people at St. Anne's, particularly Dr. Ransom. He is compared many times to Jesus Christ, and he is the religious leader of this group. The reader observes Jane being changed, not necessarily always of her own will, ever since her first meeting with Dr. Ransom. Strange feelings rise up within her at this meeting, both about herself and about Mark.