Miss Brodie has no solid religious convictions, believing more as she does in what might be described as the god within herself. Roman Catholicism, with its dramatic imagery and rituals, is the only branch of Christianity which really could appeal to her, but she dismisses it both because of her own Calvinist background, perhaps, and also because the religion places great emphasis on the necessity of atonement for sin, and Miss Brodie doesn't seem to regard herself as a sinner.