If words convey any meaning, the Old Testament teaches the existence of the Devil.
All the passages about witches and those having familiar spirits were born of a belief in the Devil.
When a man who loved Jehovah wanted revenge on his enemy he fell on his holy knees, and from a heart full of religion he cried: "Let Satan stand at his right hand."
III. TAKE THE DEVIL FROM THE DRAMA OF CHRISTIANITY AND THE PLOT IS GONE.
The next question is: Does the New Testament teach the existence of the Devil?
As a matter of fact, the New Testament is far more explicit than the Old. The Jews, believing that Jehovah was God, had very little business for a devil. Jehovah was wicked enough and malicious enough to take the Devil's place.
The first reference in the New Testament to the Devil is in the fourth chapter of Matthew. We are told that Jesus was led by the Spirit into the wilderness to be tempted of the Devil.
It seems that he was not led by the Devil into the wilderness, but by the Spirit; that the Spirit and the Devil were acting together in a kind of pious conspiracy.
In the wilderness Jesus fasted forty days, and then the Devil asked him to turn stones into bread. The Devil also took him to Jerusalem and set him on a pinnacle of the temple, and tried to induce him to leap to the earth. The Devil also took him to the top of a mountain and showed him all the kingdoms of the world and offered them all to him in exchange for his worship. Jesus refused. The Devil went away and angels came and ministered to Christ.
Now, the question is: Did the author of this account believe in the existence of the Devil, or did he regard this Devil as a personification of evil, and did he intend that his account should be understood as an allegory, or as a poem, or as a myth.