The fallen angels would obscure, that Christ was the only begotten Son of God

Hear, O Israel: The Lord our God is one Lord: and thou shalt love the Lord thy God with all thine heart, and with all thy soul, and with all thy might. Deuteronomy 6:4, 5.  

Angels were expelled from heaven because they would not work in harmony with God. They fell from their high estate because they wanted to be exalted. They had come to exalt themselves, and they forgot that their beauty of person and of character came from the Lord Jesus. This fact the [fallen] angels would obscure, that Christ was the only begotten Son of God, and they came to consider that they were not to consult Christ. 

One angel began the controversy and carried it on until there was rebellion in the heavenly courts, among the angels. They were lifted up because of their beauty. All should learn their lesson from this, that they are individually amenable to God. When they love God with all their hearts, they will be wise unto salvation. They will do His will, and their light will ever be their glory, and be undiminished because they recognize and fear and serve their Lord. The solemn work rests upon every soul to consider that he is a servant of Jesus Christ, solemnly pledged by his baptismal vows to clothe himself with the righteousness of Christ. Will we carry out the living example of the Lord Jesus?  

I am instructed that every believer must watch unto prayer, lest he fail in the Christian life battle. Every soul must daily seek the Lord with full purpose of heart, morning, noon, and night, and let the mind dwell upon the Word of God, to understand His requirements.    This Day With God, pp 128