Exposing Adventism - Satan second in command to Jesus?

Adventism teaches:

Satan had been Lucifer, the light-bearer, the sharer of God's glory in heaven, and second to Jesus in power and majesty." (Ellen G. White, Bible Echo and Signs of the Times, 11-01-1892, "Tempted in All Points Like as We are," paragraph 3)

Where does it say this in the Bible?

The Scriptures tell us:

"I am the LORD, that is My name;
I will not give My glory to another,
Nor My praise to graven images." (Isaiah 42:8 NASB.)

"My name is the LORD!
I won't let idols or humans share my glory and praise." (Isaiah 42:8 CEV.)

"For My own sake, for My own sake, I will act;
For how can My name be profaned?
And My glory I will not give to another." (Isaiah 48:11 NASB.)