Again, I ask, “What can the devil steal from God’s protected people?” Hopefully, you correctly answered, “Nothing”; the devil cannot steal anything from a child of God. Stop listening to the false messages (sermons, teachings, and/or songs); they are not based on biblical truth. If anything, the people preaching, teaching, and singing messages that claim the devil stole anything are deceiving you, like those whom Jesus spoke of.
The most rewarding aspect of using self-control for me is knowing that, with the help of the Holy Spirit, I can change any bad habit through discipline. God makes it possible when we trust Him enough to let Him help us. Let God help you take control of your mind, your actions, and your life.