>it was the "sins of the flesh" that ultimately led to the fall of man in the book of genesis after being "enlightened" by the serpent
Wrong. That's a teaching of the false (catholic) church.
"For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms."
They hid from God, thinking God doesn't see what they do when hidden/in the dark.