>>8000159Lucifer is just one of the labels for Christ. It's the word for "morning star" in Latin. In Revelations, Christ declares himself this - the bright morning star. The entire meaning of this is somewhat lost, but it basically means "the light over the nations". The closest parallel in Latin was Lucifer. But, it could also be synonymous with "Messiah".
Early Christian hymns refer to Christ as Lucifer. Take Exulstet, for example:
Flammas eius lúcifer matutínus invéniat:
ille, inquam, lúcifer, qui nescit occásum.
Christus Fílius tuus,
qui, regréssus ab ínferis, humáno géneri serénus illúxit,
et vivit et regnat in sæcula sæculórum.
Translation:
May this flame be found still burning
by the Morning Star:
the one Morning Star who never sets,
Christ your Son,
who, coming back from death's domain,
has shed his peaceful light on humanity,
and lives and reigns for ever and ever.
There is nothing in the bible which equates Lucifer with Satan, as this would be saying that Satan is the Messiah. The Hebrews do, however, mock the King of Babylon with this title as his Empire crumbled from beneath him, so as to say "you thought you were God, but you were just a man". Some people took this way too fucking literally, and thought that Satan had come to rule the Earth one time, and that he was named Lucifer. Because idiots.
One of these was Milton, who wrote "Paradise Lost". In it, Satan is, well, an anti-hero and protagonist, and goes by the name of Satan. Milton was a poet, and not a theologist, but it nevertheless made it into pop culture that Lucifer was the devil.
Calvin and Luther thought this was a bunch of crap.