Hi asdara,
Psalms 139:12 Yea, the darkness hideth not from thee; but the night shineth as the day: the darkness and the light are both alike to thee
[Satan in promoting the ways which are NOT Love does great service before God [as His covering cherub at His throne] in allowing us to see Love in contrast to the many other ways [in time] that constitute unlovingness/evil/sin as distinct , mankind simply exists to FIND OUT that the many alternatives portrayed by Satan in this world simply lead nowhere whereas Love leads us the way of the depths of our hearts back to God [although almost all will die first , excepting only those of the 144,000 of Israel of Rev 7:3-8 who have not already died by the time of the real Christ's return]
A couple of major items about your matter from the bible ...
1). Even Michael woud not ACCUSE Satan ... thus he lEAVES THIS to God [eventually] -what sense sinful men trying to accuse Satan when what he does is just SUGGEST things to men, it is men who mostly do the sinning as such :-
Jud 1:8 Likewise also these filthy dreamers defile the flesh, despise dominion, and speak evil of dignities.
Jud 1:9 Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee.
Jud 1:10 But these speak evil of those things which they know not: but what they know naturally, as brute beasts, in those things they corrupt themselves.
Jud 1:11 Woe unto them! for they have gone in the way of Cain, and ran greedily after the error of Balaam for reward, and perished in the gainsaying of Core.
2). The sin for which Satan is finally convicted by God is none less than claimed to BE God because Satan has persuaded almost all mankind to worship him as a Christ figure ['antichristos' in Greek, the one 'inplace of Christ] ,but when Satan finally goes to the temple in Jerusalem to proclaim himself God, his blaspemy triggers the return of Christ and Satan [who like Christ has manifested as a man, the biblical "man of sin", is slain by 'strangers' [Ezekiel 28:7] for his sin [wages of sin is death] :-
Isa 14:10 All they shall speak and say unto thee, Art thou also become weak as we? art thou become like unto us?
Isa 14:11 Thy pomp is brought down to the grave, and the noise of thy viols: the worm is spread under thee, and the worms cover thee.
Isa 14:12 How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!
Isa 14:13 For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
Isa 14:14 I will ascend above the heights of the clouds; I will be like the most High.
Isa 14:15 Yet thou shalt be brought down to hell, to the sides of the pit.
Eze 28:2 Son of man, say unto the prince of Tyrus, Thus saith the Lord GOD; Because thine heart is lifted up, and thou hast said, I am a God, I sit in the seat of God, in the midst of the seas; yet thou art a man, and not God, though thou set thine heart as the heart of God:
Eze 28:3 Behold, thou art wiser than Daniel; there is no secret that they can hide from thee:
Eze 28:4 With thy wisdom and with thine understanding thou hast gotten thee riches, and hast gotten gold and silver into thy treasures:
Eze 28:5 By thy great wisdom and by thy traffick hast thou increased thy riches, and thine heart is lifted up because of thy riches:
Eze 28:6 Therefore thus saith the Lord GOD; Because thou hast set thine heart as the heart of God;
Eze 28:7 Behold, therefore I will bring strangers upon thee, the terrible of the nations: and they shall draw their swords against the beauty of thy wisdom, and they shall defile thy brightness.
Eze 28:8 They shall bring thee down to the pit, and thou shalt die the deaths of them that are slain in the midst of the seas.
Eze 28:9 Wilt thou yet say before him that slayeth thee, I am God? but thou shalt be a man, and no God, in the hand of him that slayeth thee.
Eze 28:10 Thou shalt die the deaths of the uncircumcised by the hand of strangers: for I have spoken it, saith the Lord GOD.
Eze 28:11 Moreover the word of the LORD came unto me, saying,
Eze 28:12 Son of man, take up a lamentation upon the king of Tyrus, and say unto him, Thus saith the Lord GOD; Thou sealest up the sum, full of wisdom, and perfect in beauty.
Eze 28:13 Thou hast been in Eden the garden of God; every precious stone was thy covering, the sardius, topaz, and the diamond, the beryl, the onyx, and the jasper, the sapphire, the emerald, and the carbuncle, and gold: the workmanship of thy tabrets and of thy pipes was prepared in thee in the day that thou wast created.
Eze 28:14 Thou art the anointed cherub that covereth; and I have set thee so: thou wast upon the holy mountain of God; thou hast walked up and down in the midst of the stones of fire.
Eze 28:15 Thou wast perfect in thy ways from the day that thou wast created, till iniquity was found in thee.