In the traditionSatan (or Lucifer *) is considered a proud to be wanting to be equal with God, it is probably of Greek inspiration text (Prometheus myth) recover thereafter.
Always the same thing ! The traditions and the original text (one document for reference) are two different things and these are mixtures between a new doctrine and usages, customs, legends, and imagination that are added in bulk.
In the Old Testament we find a passage referring to this notion of fall: "How art thou fallen from heaven, Star, son of the morning! Art thou cut down to the ground, which didst weaken the nations! You said in your heart, I will ascend into heaven, I will exalt my throne above the stars of God; I will sit on the mount of assembly In the recesses of the north; I will ascend above the heights of the clouds; I will be like the Most High. But you were thrown into the grave, to the depths of the abyss.
There is no question here of any satan or an angel of light, but of Babylon dominating the Middle East. Then that Babylon will be followed as a model of some form of mainstream society that is found in Daniel.
** Who was also one of the names of Christ in the primitive times of Christianity, which does not facilitate the understanding!
Same as above! Primitive periods Christianity does not exist. Christ Jesus never instituted a new religion called Christian, nor even his relatives. What you allude is the Gentile Christianity caking doctrine of Christ and pagan worship traditions by comparing Christ Jesus to the sun god of the time revered among the nations. The day of alleged birth of Jesus is not an adaptation of the birth of the sun god 25 December to attract pagans to this new sect.
PS: the topic often slip into this subject that has no specific topic and disrupt the current thread.