Hi Joossa. Like another posted previously the glimpses into Satan's origins are scattered throughout the bible. A thompson Chain Reference bible or a Strong's concordance can pinpoint places where Satan is mentioned throughout the bible. I'm sorry I presently can't help with your question specifically at this time. I haven't studied his origin in depth. However, that being said, and I do not wish to open any debates presently, the issue of freewill is something I do know of. A man named John Calvin is to this day mostly disliked for his beliefs that he extracted from the bible. However, a study of Calvinism reveals that man "had" freewill in the garden of eden and became slaves to sin in need of the saviour as a result of disobedience to God. Therefore every man since has inherited a sinful nature, that was Satan's plan to divide us from God. Now that people have a sin nature they can not seek God until He calls them and gives them the grace to do so. The reason is found in Satan's lies to Adam and Eve in the garden. Satan told them once they ate from the tree they would have thir eyes open.... in effect now everyone's eyes are shut and ears until God opens them through His word. Faith comes by hearing and hearing by the word of God. Calvinism is rarely taught any longer, it was the primary belief in the protestant reformation. Freewill, also known as Arminianism(named after Jacob Arminius, it's proponent) is taught almost everywhere today). In the song Stairway to Heaven by Led Zeppelin, Satan's Lie of freewill is heard 'Yes there are two paths you can go by, but in the long run there's still time to change the road your on." But God/Jesus says "today if you still hear his voice do not harden your hearts as your fathers did....today is the day of salvation." If we continue to neglect so great a salvation in Jesus, we are hardening our hearts to the Lord's word and eventually the opportunity to know the Lord will disappear forever. That is known as the sin unto death. Only God can change our sinful hearts at anytime. Man can choose nothing until God intervenes and through God's grace He Elects(chooses) that man. This doctrine(teaching) I am referring to is known as "unconditional election." Look into Calvinism and the protestant reformation and all of that history then and compare it with modern teachings and you will see why Calvinism is so despised. It is not easy to swallow that God chooses who He wishes to be saved, etc.al. Again, I do not wish to debate anyone on these issues I am simply hoping you might research this history yourself and come to your own conclusions. I personally believe in God's absolute sovereignty, which the systematic doctrines of Calvinism absolutely illustrate with the word of God as the proof text. I hope I have been of help. May we all be counted worthy when Jesus returns.