The day came for an official presentation of the plan of salvation. God had prepared His plan from the beginning; I believe that many and even all of His spirit children already knew the plan but God needed to give His children the opportunity to accept it or reject it. He needed to let Jehovah exercise His agency and publicly propose and accept His role in the plan. Our Father also wanted to allow Lucifer to exercise his agency and put forth his own plan. A great conference was called in Heaven; we all gathered there as siblings, friends, and families. We waited in eager anticipation for the announcement of the next step in our eternal progression. Heavenly Father explained to us the Plan of Salvation and called for a Savior. Jehovah stepped forward and said he would go in accordance with His Father’s will and that the entire honor would go to the Father. This was the plan we knew and accepted. Many shouted for joy at the prospect of coming to earth (see Job 38:7). Not all were thrilled though. Then Lucifer stepped forward and revealed his plan.
Some likely knew portions of his plan but he had not let his plan be widely known - he waited for the right moment to present what he deemed a superior plan to his Father's. What was his plan? It was similar to the Father’s plan but with insidious differences. With all the power and persuasion of his rehearsed oration, he began to unfold his plan. “I propose that we will send everyone to earth to receive a body. However, I will be the Savior." Murmurs arose from the crowd. "Lucifer will be our Savior?"
He continued his speech, "But only on one condition - we will require everyone to be good. We will make sure everyone makes only good choices. Then they will not sin and they can return to live with Father. We will make sure everyone makes it back to heaven. With my illustrious plan there will be no suffering, no sin, and no sorrow. Everyone will be perfect. All will live in Heaven on earth and be as Zion. We will not lose any to the dredges of sin or the pain of despair! I will save all my brothers and sisters; I will exalt them!” People started nodding in approval. "Lucifer's plan sounds fair. It sounds good to me." Others saw his plan for what it was: "If everyone will be forced to be perfect, then we don't need a Savior. Satan wants to usurp Jehovah without actually doing anything!"
As Lucifer listened to some express their approval, he smirked. He knew something those who liked his proposal did not know; some understood Satan's motives instantly. Satan knew the fatal flaw of his plan but he was not going to tell anyone. The flaw in Satan’s plan was that no one would be able to return to Heavenly Father’s presence. Without agency and thus a time of testing, God’s children could not make the required growth that would enable them to be like their Father. All Lucifer wanted was Heavenly Father’s honor (D&C 29:36), in fact he demanded all of Heavenly Father’s honor.
That was the most insidious part of Lucifer's plan - he knew that his plan would not work; he knew it would relegate all of God’s children to eternal damnation. However, he believed he could be granted God’s power through his plan; that only shows that he did not fully understand the process and nature of exaltation. Why did Lucifer desire to take what he deemed to be the easy road to exaltation? Satan might have been frightened of what earth life entailed. He wanted the easy way out. He wanted the reward (and all of the reward) without any effort. In what would have been the most selfish act in eternity, Lucifer was willing to sacrifice the eternal progression and eternal lives of all of his brothers and sisters, just so he could be like God. Ironically, Satan’s plan that would deny people their agency resulted from him exercising his agency. God allowed the presentation of this plan because agency is an eternal principle. In his perversity and knowing that agency was essential for people to become like Heavenly Father, Satan proposed a plan that removed agency—only he would reap agency’s benefits while all of God’s other children would be denied its blessings. Lucifer wanted to usurp Jehovah's role as God through divine investiture of authority. While his plan might have started out innocently in the beginning, it was not innocent in the end.