We have to remember that sin originated in Lucifer's heart...
After Satan and those who fell with him were shut out of heaven, and he realized that he had forever lost all its purity and glory, he repented, and wished to be reinstated in heaven. He was willing to take his proper place, or any position that might be assigned him. But no; heaven must not be placed in jeopardy. All heaven might be marred should he be taken back; for sin originated with him, and the seeds of rebellion were within him. Both he and his followers wept, and implored to be taken back into the favor of God. But their sin--their hatred, their envy and jealousy--had been so great that God could not blot it out. It must remain to receive its final punishment. {EW 146.1} When Satan became fully conscious that there was no possibility of his being brought again into favor with God, his malice and hatred began to be manifest. He consulted with his angels, and a plan was laid to still work against God's government. When Adam and Eve were placed in the beautiful garden, Satan was laying plans to destroy them. In no way could this happy couple be deprived of their happiness if they obeyed God. Satan could not exercise his power upon them unless they should first disobey God and forfeit His favor. Some plan must therefore be devised to lead them to disobedience that they might incur God's frown and be brought under the more direct influence of Satan and his angels. It was decided that Satan should assume another form and manifest an interest for man. He must insinuate against God's truthfulness and create doubt whether God did mean just what He said; next, he must excite their curiosity, and lead them to pry into the unsearchable plans of God-- the very sin of which Satan had been guilty--and reason as to the cause of His restrictions in regard to the tree of knowledge. {EW 146.2}
Satan trembled as he viewed his work. He was alone in meditation upon the past, the present, and his future plans. His mighty frame shook as with a tempest. An angel from Heaven was passing. He called him, and entreated an interview with Christ. This was granted him. He then related to the Son of God that he repented of his rebellion, and wished again the favor of God. He was willing to take the place God had previously assigned him, and be under his wise command. Christ wept at Satan's woe, but told him, as the mind of God, that he could never be received into Heaven. Heaven must not be placed in jeopardy. All Heaven would be marred should he be received back; for sin and rebellion originated with him. The seeds of rebellion were still within him. He had, in his rebellion, no occasion for his course, and he had not only hopelessly ruined himself, but the host of angels also, who would then have been happy in Heaven had he remained steadfast. The law of God could condemn, but could not pardon. {1SP 29.2} He repented not of his rebellion because he saw the goodness of God which he had abused. It was not possible that his love for God had so increased since his fall that it would lead to cheerful submission and happy obedience to his law which had been despised. The wretchedness he realized in losing the sweet light of Heaven, and the sense of guilt which forced itself upon him, and the disappointment he experienced himself in not finding his expectations realized, were the cause of his grief. To be commander out of Heaven, was vastly different from being thus honored in Heaven. The loss he had sustained of all the privileges of Heaven seemed too much to be borne. He wished to regain these. {1SP 30.1} This great change of position had not increased his love for God, nor for his wise and just law. When Satan became fully convinced that there was no possibility of his being re-instated in the favor of God, he manifested his malice with increased hatred and fiery vehemence. {1SP 30.2}
Not only man but angels will ascribe honor and glory to the Redeemer, for even they are secure only through the sufferings of the Son of God. It is through the efficacy of the cross that the inhabitants of unfallen worlds have been guarded from apostasy. It is this that has effectually unveiled the deceptions of Satan and refuted his claims. Not only those that are washed by the blood of Christ, but also the holy angels, are drawn to him by his crowning act of giving his life for the sins of the world. God's dealing with the rebellion of Satan is justified before the universe. ......{BTS, December 1, 1907 par. 4}