Your belief system appears to me as a shapeless cloud, having no relation to God’s stated path to salvation in his word.
Believing that “the Devil” uses God’s perfect word to deceive, you must be in a prison of confusion. His word says that “Faith cometh by hearing, and hearing by the word of God.”
You need to hear the word of God. You can do that by simply reading it aloud.
The reason I believe that the devil tempts us using God's word is because the bible tells me so.
In this time of Lent, it is appropriate to read Jesus' temptation in the desert. Matthew 4:1-11.
The devil tempts us with our carnal weaknesses, he tempts us with our pride and ego, and thirdly he tempts using the word of God. That's why I get the Heevy Jeebies, when people claim to know they are saved. But that's just me.