1 John 3:9 "No one who has been born of God practices sin, because His seed remains in him; and he cannot sin continually, because he has been born of God."
2 Thessalonians 3:3 "But the Lord is faithful, and He will strengthen you and guard you from the evil one."
Ephesians 6:16 "In addition to all this, take up the shield of faith, with which you can extinguish all the flaming arrows of the evil one."
1 Peter 1:5 "who through faith are shielded by God’s power for the salvation that is ready to be revealed in the last time."
Psalm 121:7-8 "The LORD will guard you from all evil; He will preserve your soul. The LORD will watch over your coming and going, both now and forevermore."
Believers do slip and fall at times but they do not remain in sin, enjoying it; they want to escape it and ask God for strength to run from it.
When we have trusted in Christ, those unsaved people who used to like us no longer do. They are repulsed by the Holy Spirit Who lives in us. Even when we say nothing, the Holy Spirit convicts them of their sin making them uncomfortable with us, even if they don't understand why.
Psalm 37:28 "For the LORD loves justice and will not forsake His saints. They are preserved forever, but the offspring of the wicked will be cut off."