If Adam and Eve were the first persons God created, where did the devil in the Garden of Eden come from?
Scripture speaks of the devil and other angels as sinning against God, which resulted in their consignment to hell (see 2 Peter 2, CCC 391-93). In Satan’s rebellion, a third of the angels—represented by stars—went with him (see Revelation 12:3-4, 7-12). Stars occasionally represent angels in Scripture (e.g., Revelation 1:20, Judges 5:20). The Latin words—Non serviam—“I will not serve”—are traditionally associated with the devil, who pridefully refused to serve God in his kingdom.
By Tom Nash