Here's another excellent thought-provoking challenge from A. W. Tozer:
Spiritual Warfare and Sin: Increased Hostility
"Be sober, be vigilant; because your adversary the devil walks about like a roaring lion, seeking whom he may devour." - 1 Peter 5:8
As we move farther on and mount higher up in the Christian life we may expect to encounter greater difficulties in the way and meet increased hostility from the enemy of our souls....Satan hates the true Christian for several reasons.
One is that God loves him, and whatever is loved by God is sure to be hated by the devil. Another is that the Christian, being a child of God, bears a family resemblance to the Father and to the household of faith. Satan's ancient jealousy has not abated nor his hatred for God diminished in the slightest.
Whatever reminds him of God is without other reason the object of his malignant hate.
A third reason is that a true Christian is a former slave who has escaped from the galley, and Satan cannot forgive him for this affront.
A fourth reason is that a praying Christian is a constant threat to the stability of Satan's government.
The Christian is a holy rebel loose in the world with access to the throne of God. Satan never knows from what direction the danger will come.
taken from That Incredible Christian, 71
"Lord, it's not hard to see why Satan attacks. May I continue to be enough of a threat to him to merit his attention! Don't ever let me become so anemic in my Christian walk that he doesn't need to bother with me. Amen."