Are YHWH and Satan Equals?

 The following insightful comment is from C. S. Lewis' The Screwtape Letters:

"The commonest question is whether I really 'believe in the Devil.'

"Now, if by 'the Devil' you mean a power opposite to God and, like God, self-existent from all eternity, the answer is certainly No. There is no uncreated being except God. God has no opposite. No being could attain a 'perfect badness' opposite to the perfect goodness of God; for when you have taken away every kind of good thing (intelligence, will, memory, energy, and existence itself) there would be none of him left.

"The proper question is whether I believe in devils. I do. That is to say, I believe in angels, and I believe that some of these, by the abuse of their free will, have become enemies to God and, as a corollary, to us. These we may call devils. They do not differ in nature from good angels, but their nature is depraved.

"Devil is the opposite of angel only as Bad Man is the opposite of Good Man. Satan, the leader or dictator of devils, is the opposite, not of God, but of Michael [the archangel].

"I believe this not in the sense that it is part of my creed, but in the sense that it is one of my opinions. My religion would not be in ruins if this opinion were shown to be false. Till that happens—and proofs of a negative are hard to come by—I shall retain it. It seems to me to explain a good many facts. It agrees with the plain sense of Scripture, the tradition of Christendom, and the beliefs of most men at most times. And it conflicts with nothing that any of the sciences has shown to be true."