"Lucifer makes his appearance in the fourteenth chapter of the Old Testament book of Isaiah, at the twelfth verse, and nowhere else: "How art thou fallen from heaven, O Lucifer, son of the morning! How art thou cut down to the ground, which didst weaken the nations!"
In the original Hebrew text, the fourteenth chapter of Isaiah is not about a fallen angel, but about a fallen Babylonian king, who during his lifetime had persecuted the children of Israel. It contains no mention of Satan, either by name or reference. The Hebrew scholar could only speculate that some early Christian scribes, writing in the Latin tongue used by the Church, had decided for themselves that they wanted the story to be about a fallen angel, a creature not even mentioned in the original Hebrew text, and to whom they gave the name "Lucifer."
Why Lucifer? In Roman astronomy, Lucifer was the name given to the morning star (the star we now know by another Roman name, Venus). The morning star appears in the heavens just before dawn, heralding the rising sun. The name derives from the Latin term lucem ferre, bringer, or bearer, of light." In the Hebrew text the expression used to describe the Babylonian king before his death is Helal, son of Shahar, which can best be translated as "Day star, son of the Dawn."
Theologians, writers, and poets interwove the myth with the doctrine of the Fall, and in Christian tradition Lucifer is now the same as Satan, the Devil, and --- ironically --- the Prince of Darkness.
So "Lucifer" is nothing more than an ancient Latin name for the morning star, the bringer of light.
In Latin at the time, "lucifer" actually meant Venus as a morning star. Isaiah is using this metaphor for a bright light, though not the greatest light to illustrate the apparent power of the Babylonian king which then faded."
