First off, Lucifer (Latin that means "light bearer") is not Satan the Devil, for those who read Isaiah 14 carefully can readily recognize that the Latin word "Lucifer" that is accurately translated as "shining one" is speaking of the Babylonian Dynasty of kings.("shining one" from the Hebrew word heylel, Isa 14:12).
At Isaiah 14:1-3, it establishes who the "shining one" was, whereby it reads: "For Jehovah (God's personal name) will show mercy to Jacob, and he will again choose Israel. He will settle them in their land (after having been captives of ancient Babylon for 68 years, from 607-539 B.C.E.), and the foreign residents will join them and attach themselves to the house of Jacob. And peoples will take them and bring them to their own place, and the house of Israel will possess them as male and female servants in Jehovah’s land; and they will be the captors of those who held them captive (a prophecy that applies in "the final part of the days" or our time period regarding Babylon the Great, whereby the false religions of the world release their "captives" into Jehovah's pure worship, see Rev 17 and Isa 2:2-4), and they will have in subjection those who were forcing them to work. In the day when Jehovah gives you rest from your pain and from your turmoil and from the hard slavery imposed on you, you will recite this proverb against the king of Babylon: “How the one forcing others to work has met his end ! How the oppression has ended !"
Then, at Isaiah 14:12, it reads: "How you have fallen from heaven (or from their haughty, proud state), O shining one (Hebrew heylel, Latin Lucifer), son of the dawn ! How you have been cut down to the earth, you who vanquished nations !"
At Isaiah 14:16, 17, it clearly identifies who is the "shining one", who "Lucifer" is, by saying: "Those seeing you will stare at you (in shock as to how this could have happened to ancient Babylon); They will closely examine you, saying,' Is this the man ( such as King Nebuchadnezzar, reigned 625-582 B.C.E.) who was shaking the earth, who made kingdoms tremble, who made the inhabited earth like the wilderness and overthrew its cities, who refused to let his prisoners go home ? ’ "(see 2 Kings 24:12, 14 and 25:8 whereby in 618 B.C.E, 18 year old king Jehioachin and his mother, along with other exiles [such as Daniel and his three Hebrew companions, Dan 1:1, 2, 6, 7] were taken captive to Babylon as well as in 607 B.C.E. when most of the survivors of Jerusalem were taken captive as exiles back to Babylon)
Thus, "Lucifer" or more accurately "shining one" (for the Babylonian Dynasty felt that they were like the sun or stars, a "shining one" to be looked up like a god, saying: "I will ascend to the heavens. Above the stars of God I will lift up my throne", Isa 14:13) was speaking, not of Satan, but the Babylonian Dynasty of kings, especially Nebuchadnezzar, who is spoken of some 60 times in the Hebrew Scriptures, commonly but inaccurately called the "Old Testament".