Scripture predated Moses.
Galatians 3:8
And
the scripture, foreseeing that God would justify the heathen through faith,
preached before
the gospel unto Abraham, saying, In thee shall all nations be blessed.
If we understand the principle of Mark 4:15 the tempter, the deceiver was IN the "thought processes" of them both. It's pointless to see the serpent as an "external" matter.
There was Adam, Eve, and the tempter who had entered into their hearts and deceived them.
There were "invisible" beasts with invisible powers created by God. They still exist. Rev. 16:13-14
That's the common spin that's taught in most colleges in the U.S. today, but it is NOT true. God, His Ways and Means were specifically directed into the physical lineage of Christ from the beginning.
The ways of Satan are to blame only man for sin and direct attentions away from himself.
Revelation 12:10
And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for
the accuser of our brethren is cast down, which
accused them before our God day and night.