Scripture teaches that God is love and, since His character is constant, He has always been love. God is light and in Him is no darkness at all. His purposes and His plans are righteous. He is “holy,” meaning that He is separate from His creation. God is not tainted by a sin-stained creation, provided it can be shown from His Word that He is in no way responsible for its having been stained.
What was the decision that God faced “in the beginning” as He contemplated His future creation? It was whether or not to create independent free-will beings with not only the capacity to reciprocate His love, but also the capacity to reject it and turn against Him. One is not possible without the other. As E.G. White put it:
The law of love being the foundation of the government of God, the happiness of all created beings depended upon their perfect accord with its great principles of righteousness. God desires from all His creatures the service of love — homage that springs from an intelligent appreciation of His character. He takes no pleasure in a forced allegiance, and to all He grants freedom of will, that they may render Him voluntary service. 
It seems logical that before God made the decision to create living beings with freedom of will, He had to plan for their possible failure. We believe that in His infinitely diversified wisdom He contemplated every conceivable eventuality and formulated a contingency plan for each, with a view toward His desired goal for mankind. He decided to “go for it,” and because God’s nature is pure righteousness, in His acts of creating such beings He knowingly and willingly committed Himself to a totally righteous dealing with all of them, even if they chose to rebel against Him.
As far as we know from Scripture, the first beings created by God were angels (Job 38:4-7). One of the most powerful is referred to in the Bible as “Lucifer.”  Although he was an awesome and powerful being, Lucifer was not made morally perfect. That is, he had free will, he could either obey God or disobey Him, and it was up to him to choose between these two alternatives. Speaking figuratively about Lucifer’s beauty, wisdom and ability, Ezekiel wrote:
(12) Son of man, take up a lament concerning the king of Tyre [Satan ] and say to him: This is what the Sovereign Lord says: “You were the model of perfection, full of wisdom and perfect in beauty.
(13) You were in Eden, the garden of God; every precious stone adorned you: ruby, topaz and emerald, chrysolite, onyx and jasper, sapphire, turquoise and beryl. Your settings and mountings were made of gold; on the day you were created they were prepared.
(14) You were anointed as a guardian cherub, for so I ordained you. You were on the holy mount of God; you walked among the fiery stones.
(15) You were blameless in your ways from the day you were created till wickedness was found in you.”
Some will ask, “How could Lucifer have even conceived of evil?” This is a very good question, and we believe the answer lies in the above verses. First of all, remember that God created him with genuine freedom of will. Second, God in His goodness had made Lucifer so magnificent that you could say he had a taste of what it was like to be God.
The question could be asked: Why didn’t God create Lucifer with less ability and wisdom, in order to protect Himself against the consequences of his potential rebellion? The only answer we can think of lies in the phrase “the model of perfection” in Ezekiel 28.
The KJV reads, “thou sealest up the sum,” which E.W. Bullinger translates “thou art the finished pattern.” Lucifer was the finished pattern, or the model of perfection, for a created being. That is, God gave him all the capacity for wisdom and understanding that He could give a created being.
Among all God’s creation, Lucifer was most capable of perceiving God’s nature and goodness, having been made most like Him. But instead of appreciating the grace of this exalted station and enjoying the fellowship available with God, he was lifted up in pride, thinking himself to be deserving of even greater status — that due only the Creator Himself. He was close enough to being like God that he thought equality with God was something he could grab. 
Making Lucifer “the model of perfection, full of wisdom and perfect in beauty” was an expression of God’s magnanimity, and to His credit. Lucifer should have been filled with thanksgiving and praise for his Creator, and eager to serve Him in response to God’s blessings. Instead, pride in his own greatness fueled his desire for supremacy. All he ever said was, “I love Lucifer.” His pride finally drove him to attempt to usurp God’s ultimate authority.
Isaiah speaks of Lucifer’s ambitions:
Isaiah 14:13 and 14
(13) You said in your heart, I WILL ascend to heaven; I WILL raise my throne above the stars of God; I WILL sit enthroned on the mount of assembly, on the utmost heights of the sacred mountain.
(14) I WILL ascend above the tops of the clouds; I WILL make myself like the Most High. 
It is obvious that Lucifer had freedom of will, because five times he said, “I will.” But God will have the last word.  The impending doom of the Devil is certain, and many verses attest to that fact. God responded to Lucifer’s pride and rebellion by driving him from His presence and casting him to earth.
Ezekiel 28:16 and 17
(16) Through your widespread trade you were filled with violence, and you sinned. So I drove you in disgrace from the mount of God, and I expelled you, O guardian cherub, from among the fiery stones.
(17) Your heart became proud on account of your beauty, and you corrupted your wisdom because of your splendor. So I threw you to the earth; I made a spectacle of you before kings. 
As a result of his fall, Lucifer became the chief antagonist of mankind. He is called by many names in Scripture. He is called “the Devil” (Rev. 20:2 — diabolos literally means “slanderer”), “Satan” (Luke 22:31 — the Greek word satanas comes from the Hebrew satan, which means “adversary”), “Belial” (2 Cor. 6:15 — it means “worthless,” and is used in connection with filthiness and wickedness), “serpent” (Gen. 3:1 — to emphasize his evil craftiness), “dragon” (Rev. 20:2 — to emphasize his evil and power), “tempter” (Matt. 4:3), “accuser” (Rev. 12:10), “evil one” (Matt. 6:13), “god of this age” (2 Cor. 4:4), “prince (John 12:31 — ruler; Greek = arche) of this world,” “prince of demons” (Mark 3:22), and “the ruler of the kingdom of the air” (Eph. 2:2). As the amount of evil and suffering on earth attests, the Devil is doing an excellent job of living up to his biblical names.
Why didn’t God destroy Satan at the time of his original rebellion? Another good question. We believe E.G. White offers a plausible explanation:
Even when it was decided that he could no longer remain in Heaven, infinite wisdom did not destroy Satan. Since the service of love can alone be acceptable to God, the allegiance of His creatures must rest upon a conviction of His justice and benevolence. The inhabitants of Heaven,… being unprepared to comprehend the nature or consequences of sin, could not then have seen the justice and mercy of God in the destruction of Satan. Had he been immediately blotted from existence, they would have served God from fear, rather than from love. The influence of the deceiver would not have been fully destroyed, nor would the spirit of rebellion have been utterly eradicated. Evil must be permitted to come to maturity. For the good of the entire universe through ceaseless ages, Satan must more fully develop his principles, that his charges against the divine government might be seen in their true light by all created beings, that the justice and mercy of God and the immutability of His law might forever be placed beyond all question.
Satan’s rebellion was to be a lesson to the universe through all coming ages, a perpetual testimony to the nature and terrible results of sin. The working out of Satan’s rule, its effects upon both men and angels, would show what must be the fruit of setting aside the divine authority. It would testify that with the existence of God’s government and His Law is bound up the well being of all the creatures He has made. Thus the history of his terrible experiment of rebellion was to be a perpetual safeguard to all holy intelligences, to prevent them from being deceived as to the nature of transgression, to save them from committing sin, and suffering its punishment. 
As we have seen, God’s Word sets forth the role of the Devil in the origin of evil and sin — a most logical and plausible explanation. But some people do not believe that there is any such thing as “the Devil.” Their alternative explanations for evil, sin and suffering leave people without hope or recourse, having to blame God, themselves, their mothers, society or cruel cosmic chance.
We find the biblical evidence for the existence of the Devil completely compelling. Moreover, the evidence of evil in the world around us points to a sinister intelligence behind all the misery and suffering we see. Concerning this, E. W. Kenyon wrote:
There is no explanation for the intelligence and organization that is behind the power of sin, if there be no such a being as Satan. The prevalence, power and malignity of sin compel us to look for a cause. 
E.G. White’s perspective is also pertinent here:
While men are ignorant of his devices, this vigilant foe is upon their track every moment. He is intruding his presence in every department of the household, in every street of our cities, in the churches, in the national councils, in the courts of justice, perplexing, deceiving, seducing, everywhere ruining the souls and bodies of men, women, and children, breaking up families, sowing hatred, emulation, strife, sedition, murder. And the Christian world seems to regard these things as though God had appointed them and they must exist. 
The sin of Lucifer is most surely the root cause of all evil and suffering, but it is not the only cause. In order to answer the question asked of Jesus in John 9, “Who sinned?” we must look further in God’s Word.
 White, Final War, page 2.
 The Hebrew word translated “ Lucifer” in Isaiah 14:12 (KJV) actually means “shining star.” The Latin Vulgate translated the Hebrew as “Lucifer,” which made its way into the Roman Catholic Douay Version and into the King James Version.
 The phrase “King of Tyre” is put for Satan by the figure of speech Antonomasia. Antonomasia is a common figure of speech. The World Book Dictionary defines it as follows: “1. The use of an epithet, title, etc., instead of a person’s name, as to refer to an ambassador as ‘his Excellency,’ or to a judge as ‘his Honor.’ 2. The use of a proper name to express a quality, as to call a patient person ‘a veritable Job.’” E.W. Bullinger expands this and gives more examples: “As when a name of some office, dignity, profession, science, or trade is used instead of the proper name of the person, e.g., when we speak of the Queen as Her Majesty, or of a nobleman as his lordship; or when a wise man is called a solon, or a Solomon, etc. When we speak of David as ‘the Psalmist,’ or of Paul as ‘the Apostle,’ we use the figure Antonomasia.” E.W. Bullinger, Figures Of Speech Used In The Bible. (page 682). In this case, the “King of Tyre” is not the human king, but rather the one who is the “prince of this age” (2 Cor. 4:4), the Devil.
 Philippians 2:6-11 makes it clear that Jesus, though he was adorned with holy spirit without measure and shared in God’s divine nature, never pridefully aspired to a higher position than that of a servant to others. Rather, he sought to serve his Father and Creator, not thinking that “equality with God was something to be grasped,” as had Lucifer. God responded to His Son’s heart-felt humility and obedience by not just exalting Him, but by highly exalting him to functional equality with Himself, making him worthy of honor, worship and praise.
 Some have doubted whether Isaiah 14:12-17 actually refers to a spirit being that warred with God and now is known as the Devil. We find the textual and contextual evidence compelling, and refer the reader to some of the good work on the subject that has already been done by men such as E.W. Bullinger, C.C. Ryrie and C. I. Scofield. Godly men have long recognized the need for reading the Scriptures with a spiritual sensitivity, because a number of verses in the Bible have both a present and future application. Two such examples are Hosea 11:1 and Psalm 69:9. Modern critics ignorantly laugh at Matthew’s “fanciful exegesis” of Hosea 11:1 (see Matt. 2:15) or John’s “ignoring context” in interpreting Psalm 69:9 (see John 2:17), but we accept the text as authoritative.
 In the KJV of Ezekiel 28:16-18, God says “I will” six times in relation to how He will one day, once and for all, dispose of the Devil.
 The last clause is still future, and shows us that Satan’s original defeat foreshadows his eventual destruction.
 White, Final War, page 2.
 E.W. Kenyon, The Father And His Family (Kenyon’s Gospel Publishing Society, Seattle WA, 1964), page 57.
 White, Final War, page 17.