I hadn’t really thought about the concept of the Devil being the great Deceiver.
He's a liar and the father of lies.
Jesus speaking ......
John 8:43-45 Why is my language not clear to you? Because you are unable to hear what I say. You belong to your father, the devil, and you want to carry out your father's desire. He was a murderer from the beginning, not holding to the truth, for there is no truth in him. When he lies, he speaks his native language, for he is a liar and the father of lies. Yet because I tell the truth, you do not believe me!