If my thirst for joy and meaning and passion are satisfied by the presence of the promises of Christ, the power of sin is broken. We do not yield to the offer of sandwich meat when we can see the sizzling steak on the grill… At first lust tricks me into feeling that I would really miss out on some great satisfaction if I followed the path of purity. But then I take up the sword of the Spirit and begin to fight… And as I pray for my faith to be satisfied with God’s life and peace, the sword of the Spirit carves the sugar coating off the poison of lust… And by the grace of God, (lust’s) alluring power is broken.
John Piper