"What have your dreams been telling you?"

All of Celestia's dreams here were about her sister -- either reliving the moments in which Luna had become Nightmare Moon, and Celestia had been forced to banish her, or more recently, simply their dichotomous existence. Day and night, light and darkness, sun and moon. In that respect, the more recent dreams had been less horrifying, but not so significantly different that she truly felt they were on a separate topic.