The name Satan (stn in Hebrew) comes from Judaism meaning something like adversary. The being served as a companion and counter view to that of the Jewish god, testing God's followers and prompting God to prove the power of its people's faith and dedication.
In Christianity, Satan is the fallen angel Lucifer, who is typically seen as the one responsible for weakness in the wills of Christians when they fail to avoid sin. Portrayed as a trickster and usually depicted as a red, man like being with horns, cloven feet and a tail. Much of the image of the Christian Satan is an amalgam of imagery associated with gods of pagan faiths that were absorbed by Christianity as it spread further West with Roman conquest.
One day the divine beings presented themselves before the Lord, and the Adversary (stn) came along with them. The Lord said to the Adversary,"Where have you been?"
The Adversary answered the Lord, "I have been roaming all over the earth."
The Lord said to the Adversary, "Have you noticed My servant Job? There is no one like him on earth, a blameless and upright man who fears God and shuns evil!"
The Adversary answered the Lord, "Does Job not have good reason to fear God? Why, is it You who have fenced him round, him and his household and all that he has. You have blessed his efforts so that his possessions spread out in the land. But lay Your hand upon all that he has and he will surely blaspheme You to Your face."
The Lord replied to the Adversary, "See, all that he has is in your power; only do not lay a hand on him."
The Adversary departed from the presence of the Lord.
Common escape for those who fall into sin:
Satan made me do it.