Oh, about the Morning Star/Evening Star references … assuming someone else hasn’t explained it already…
these are the morning and evening appearances of the “walking star” Venus. Venus frequently appeared just before the rising sun and/or around the time of the setting sun. (Though I confess I’m not as clear on the evening timing as I am on the morning timing.)
In Christian tradition, Venus could be referred to as a light bearer, because it preceded the rising sun… just as the Baptist was to precede the Savior.