just see how there is almost no distinctive difference between God and satan in the books of old testament as opposed to the written in the books of the New Testament, and exactly this is one of the big distinctions between the two covenants, because satan had an inner/domestic power in the times before the New Testament whereby it was able to rule over the world almost as a part of God, and therefore the believers then were under greater oppression insomuch they were not able to affirm so well that there are two completely distinct sides of the divine - the God and the devil, and that satan has nothing to do with God, because the most believers were under a (very) strong deception that all appearances/occurrences are of the single and one (and the same) God, but see in how many places of the New Testament books there are shown explications about the difference between the "Light"/God and the "darkness"/devil and that the following of the evil is not right, or as it has also been written:
1 John 5:20-21 "And we know that the Son of God is come, and hath given us an understanding, that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life. Little children, keep yourselves from idols(i.e. from misbeliefs). Amen."
Blessings