I am inching my way through Overcoming Sin and Temptation by John Owen (eds. Kapic and Taylor), enjoying each bite the way I would a Godiva chocolate. One thing that the book is doing for me is making me more suspicious of the deceitfulness of my own heart. Jesus calls us to "Watch and pray lest you enter into temptation." This watchfulness must be continual, for our deceitful heart remains with us meddling in every resolve and desire to be obedient.
Indwelling sin is like a wart between the toes. The roots are deep, and wider inside than on the surface. It grows. You can trim it back so that it doesn't press so painfully, but it lives on and will grow again.
Warts sometimes die but our deceitful heart will be with us until we die. Only then will we be free of the battle. Until then, press in for the fight. John Owen's book is a manual for the hand-to-hand combat.