2. Who are angels, and how did Lucifer deceive them into rebellion against God?

Angels were created to enjoy intimate fellowship with God. Of superior strength, and obedient to God’s Word (Psalms 103:20), they function as servants or “ministering spirits.” Though generally invisible, at times they appear in human form. It was through one of these angelic beings that sin was introduced to the universe. JTL15 5.1

Lucifer was the highest of the created angels. He began to covertly spread discontent and rebellion in heaven. To accomplish his evil purposes, he used flattery and deceit in his efforts to blind the angels to God’s love. JTL15 5.2

The resulting discontent and disloyalty to God’s government grew until one third of the angelic host joined him in rebellion (Revelation 12:4). The tranquility of God’s kingdom was shattered, and “war broke out in heaven” (Revelation 12:7). The celestial warfare resulted in Satan— depicted as the great dragon, the ancient serpent, and the devil—being “cast to the earth, and his angels cast out with him.” Revelation 12:9 JTL15 5.3