... Satan is also called "god" in many places, and devils as "gods", and even humans are called "gods" in places (in both good and bad senses, not as Deity of course, but as rulers).
Adam / Eve, in the beginning, before sin, were as "gods" knowing only good, but after sin, becoming "as gods" knowing "good and evil".
Lucifer / Heylel (aka satan, devil, old serpent, dragon) was once "cast out" (Rev. 12:7-9 KJB) of heaven (where all is light and glory; Rev. 21:25, 22:5 KJB) and eventually fell through "outer darkness" (2 Pet. 2:4; came to) to the earth (Gen. 3:1 KJB).
Satan was later called "the god of this world" (2 Cor. 4:4 KJB), having received dominion (Gen. 1:26,28 KJB) and "power" (Luk. 4:6 KJB) from the first Adam (Gen. 3:5-6; 1 Cor. 15:45; 1 Tim. 2:13 KJB) who submitted to the temptation of the devil through his wife Eve (as medium; Gen. 3:6; Rev. 12:9 KJB), and so became the ruler "of darkness of this world" (Eph. 6:12 KJB), and sits upon the "throne of iniquity" (Psa. 94:20; Psa. 1:1; Isa. 14:13; Amo. 6:3; Rev. 2:13, 13:2, 16:10 KJB. &c.)
He was able to travel from this world as the head representative thereof, and present himself at the gate of God in Heaven (Job 1:6-12, 2:1-7; 1 Kin. 22:19-23; 2 Chr. 18:18-22 KJB). However, since Calvary, the Last Adam, Jesus Christ, obtained the dominion back as the new Head of redeemed humanity (1 Cor. 15:45-47 KJB), and so the devil was "cast down" (Rev. 12:10) from being that representative then (AD 31).
Yet, satan still rules his lost from the "high places" in the earth (Eph. 6:12 KJB).
... to be continued ...
In Genesis, it was satan, by the serpent, who blinded mankind, leading them into darkness (Gen. 3:1-7 KJB), taking them as prisoners and captive to his will. Their eyes (mental) became dim unto righteousness, and opened unto evil. It was Jesus who came and had to restore the light lost, by the Gospel. Jesus heals blindness. The devil causes blindness. God allows blindness. God did not take credit for their blindness, but laid it squarely upon the devil (Gen. 3:14, "... the serpent, Because
thou hast done this ..."), and responds to the devils actions, by taking counter actions (Gen. 3:15,21 KJB).
In scripture, it is sometimes attributed to God's allowance for what the devil does, since the devil needs allowance from God to do anything, see Jesus and Peter (Luk. 22:31):
Luk_22:31 And the Lord said, Simon, Simon, behold, Satan hath desired to have you, that he may sift you as wheat:
Other examples of such as with King David in the numbering of the peoples:
2Sa 24:1 And again the anger of the LORD was kindled against Israel, and he moved David against them to say, Go, number Israel and Judah.
1Ch_21:1 And Satan stood up against Israel, and provoked David to number Israel.
It was the devil / satan, by God's allowance, in punishing David for pride in relying upon physical arms, numbers rather than on God.
Similarly, other examples are found in Job (Job 1:7-16,21, 2:1-10 KJB), and in 1 Kin. and 2 Chr.
Notice in Job it is called "the fire of God", but in reality it was satan accomplishing the destruction by such elements ("the LORD said unto Satan, Behold, all that he hath is in thy power; only upon himself put not forth thine hand", "The fire of God is fallen from heaven", "the LORD said unto Satan, Behold, he is in thine hand; but save his life", "Satan forth from the presence of the LORD, and smote Job with", and even Job did not fully understand, "the LORD gave, and the LORD hath taken away; blessed be the name of the LORD" for it was only by God's allowance of the devils actions, not by action of God that Job's possessions and health were taken away). Continuing in Job, the devil was even working in Job's friends (Job 4:12-21, 42:7 KJB) and it was God who restored what the devil had stolen (Job 42:10). The Bible is clear that it is the devil which steals, destroys (Jhn. 8:44 KJB).
In 1 Kin. 22:19-24; 2 Chr. 18:18-23, the "lying spirit" (satan) was again amongst the councils of God in heaven, and God allowed him to do what he would do (lie, deceive, blind). God did not command satan to lie, but simply allowed satan to do what he was going to do, to punish a wicked king. Even the serpent serves the purposes of God's ultimate will, even as a staff in the hand of Moses.
In 2 Cor. 12:7 Paul ascribes the messenger of his partial blindness to satan by God's merciful allowance.
So, in the days of Moses, how were the minds of men "blinded"? By the devil who harrassed them in the wilderness, and God allowed "serpents", "scorpions", to do so because of their hardness of heart / unbelief / lack of faith. In 2 Cor. 13:12-16, it is the devil which blinds, but it is always God who gives light.
2Co 3:12 Seeing then that we have such hope, we use great plainness of speech:
2Co 3:13 And not as Moses, which put a vail over his face, that the children of Israel could not stedfastly look to the end of that which is abolished:
2Co 3:14 But their minds were blinded: for until this day remaineth the same vail untaken away in the reading of the old testament; which vail is done away in Christ.
2Co 3:15 But even unto this day, when Moses is read, the vail is upon their heart.
2Co 3:16 Nevertheless when it shall turn to the Lord, the vail shall be taken away.
2Co 4:1 Therefore seeing we have this ministry, as we have received mercy, we faint not;
2Co 4:2 But have renounced the hidden things of dishonesty, not walking in craftiness, nor handling the word of God deceitfully; but by manifestation of the truth commending ourselves to every man's conscience in the sight of God.
2Co 4:3 But if our gospel be hid, it is hid to them that are lost:
2Co 4:4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
2Co 4:5 For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake.
2Co 4:6 For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.
The same goes for other texts such as Jhn. 12:37-41; Isa. 6:8-12; Rom. 11:7-10,16-26, &c. When texts say that God hardeneth, it must be in the same context knowing that there is an enemy (satan / devil) which brings unbelief to the heart (Gen. 3:1-7 KJB). Consider that OT texts likewise say God hardened Pharaoh's heart, but other texts say Pharaoh hardened his own heart (same contexts) by refusing the counsels of God through Moses, by listening to the lying spirit of Egypt (satan / devil) rather than to the Holy Spirit working in Moses. God brought circumstances and choices, which such persons as Pharaoh must choose between light and darkness, and some men choose to love darkness rather than light.
Joh_3:19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.
Notice, just as the "lying spirit" (satan) was allowed to be sent by God in the OT (1 Kin. 22; 2 Chr. 1; Job KJB), so too also in the NT, for those who reject the Light (Jesus / God), there is only one other option (devil / satan):
2Th 2:10 And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.
2Th 2:11 And for this cause God shall send them strong delusion, that they should believe a lie:
2Th 2:12 That they all might be damned who believed not the truth, but had pleasure in unrighteousness.
When men reject the light sent / commanded by God, only darkness remains. When men reject the real God of Creation, they accept the rule of the "god of this world (present evil world)" satan in God's stead / place.
God:
Isa_42:7 To open the blind eyes, to bring out the prisoners from the prison, and them that sit in darkness out of the prison house.
devil:
Joh_10:21 Others said, These are not the words of him that hath a devil. Can a devil open the eyes of the blind?