 of Tyre's judgement and fall were due to the abundance of its trade filling them with violence (28:16). Tyre was renowned around the ancient Near East as a important port and commercial centre.
One common argument used to support the view that Satan is a fallen angel says that Ezekiel 28 distinguishes between the prince of Tyre (v2), who they say was the physical ruler of Tyre, and the king of Tyre (v12), who they say is Satan. However, a study of Ezekiel's use of the words "king” and “prince” shows that they are used interchangeably. For example, David is called king in 37:29, but prince in 34:24 and 37:25. Jehoiakim is called king in 1:2, but chapter 19 is a lamentation for the princes of Israel, Jehoahaz, Jehoiachin and Zedekiah, all of whom were kings. In 7:27 king and prince are used in the parallelism: "the king shall mourn, the prince shall be wrapped in despair".
What do we know about the origin of Satan?
A simple answer is that we don't know, and probably are not meant to know. God does not reveal everything, and it is important not to speculate on what God chooses not to reveal to us, or to make additions to the Biblical revelation. We have to be satisfied with what information we have. In the end, does it matter? We know Satan exists and that he is a deceiver and liar; that is enough. We also know he is defeated by Jesus' death on the cross and his resurrection (Col 2:15, 1 John 3:8b). We also can be certain of his destiny of eternal torment in the lake of fire and sulphur (Rev 20:10). I'm sure that Satan enjoys people being taught about his glorious past, so that people think that he was some glamorous figure, rather than the liar, deceiver, adversary, accuser, condemner, that he really is. The Bible has nothing positive to say about him at all.
There are only two clues about his origin in the Bible. Jesus told the Pharisees, “You are from your father the devil ... He was a murderer from the beginning and does not stand in the truth” (Jn 8:44). “From the beginning” probably means for all the time he has existed. Also in John’s first letter, “Everyone who commits sin is a child of the devil, for the devil has been sinning from the beginning” (1 John 3:8). These passages would indicate that the devil has always been a sinner and a murderer, and that he has no great and beautiful past.
Even though it causes philosophical problems, on a practical level there is very little difference between something that was created evil and something that was created good and became evil. The significant matter is that Satan exists and is evil now. Again, this is a question that is not answered in the Bible. God either created Satan as an adversary, or Satan later became an adversary, the end result is the same. One of the reasons for Satan's existence is so that humans as God's created beings should endure some testing. It is never God's will that we sin, but it is God's will that we are tested and tempted. Consistently through the New Testament it is taught that testing is part of the Christian walk (eg. James 1:2-4), so that we learn patience, our faith is strengthened, our love for God proven. Our love for God has to be a positive response and choice. In order to choose to love God, it is necessary to have opposite influence to choose to reject.
What the commentaries and Bible handbooks say
I have yet to find a commentary which, by looking at the whole book and the relevant passages in context, teaches with any degree of certainty that either Isaiah 14 or Ezekiel 28 describe the fall of Satan. However, there are plenty of topical books on spiritual warfare that quote these passages, saying that they definitely describe Satan's fall.
In the Keil-Delitzsch commentary, the fall of Satan mentioned and rejected in Is 14, and not mentioned in Ezek 28. Matthew Henry makes no mention of Satan in either Is 14, or Ezek 28. In the Expositors Bible Commentary, Geoffrey Grogan writing on Isaiah 14 says it points to Satan indirectly as working through world rulers, but not describing the fall of Satan. Also in the Expositors Bible Comm