The Word of God (the Bible) clearly states: "The fear of the LORD is the beginning of wisdom." (Proverbs 9:10; Psalm 111:10, italics and emphasis mine)
Why not fear the devil? Because we are children of the living GOD, that's why. So here's how this really works:
"Resist the devil, and he will FLEE from you." (James 4:7, italics and emphasis mine)
The devil has no power over us that we do not first abdicate to him. Give him a tough time and he'll move on to easier prey. Heaven knows there's enough of that around for him these days.
Re-read the original post carefully.