You added that last part to the Scripture. Living by faith is standing on what we know is true according to what Christ has done and who we are in Him. Grace teaches us to say no to ungodliness. We rely on both - faith is how we stand (think shield of faith); one is how we walk.
18 But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be glory both now and forever! Amen. (from 2 Pet. 3)
11 For the grace of God has appeared that offers salvation to all people. 12 It teaches us to say “No” to ungodliness and worldly passions, and to live self-controlled, upright and godly lives in this present age, 13 while we wait for the blessed hope—the appearing of the glory of our great God and Savior, Jesus Christ, 14 who gave himself for us to redeem us from all wickedness and to purify for himself a people that are his very own, eager to do what is good.
15 These, then, are the things you should teach. Encourage and rebuke with all authority. Do not let anyone despise you. (from Tit. 2)
The New Covenant is between God the Father and God the Son. Read the letter to the Hebrews. Read the letter to the Ephesians. Read the letter to the Galatians. God's requirements were fulfilled by God in the flesh, Christ. We enter into the New Covenant by God's grace, through faith. Once we enter into the New Covenant, it is God Who keeps us there. Think about it: the requirements and fulfillment of the New Covenant is
outside of us. There is nothing that we do to enter in but to accept and receive what God had done in Christ. It is the gift of God (see Romans chapters 3-5). The New Covenant is superior to the Old in that we can't break it, because we are not one of the parties who ratified it! We enter in by faith. That's it. Entrance and residing in it is the Gift of God. God the Father and God the Son maintain the New Covenant in their perfection. New Covenant is based on better promises and is superior to the Old in every way!
It appears you deny the New Birth, the New Life, the New Heart that is put within us when we believe. You should not look at those who believe as the world does:
16 So from now on we regard no one from a worldly point of view. Though we once regarded Christ in this way, we do so no longer. 17 Therefore, if anyone is in Christ, the new creation has come: The old has gone, the new is here! 18 All this is from God, who reconciled us to himself through Christ and gave us the ministry of reconciliation: 19 that God was reconciling the world to himself in Christ, not counting people’s sins against them. And he has committed to us the message of reconciliation.
20 We are therefore Christ’s ambassadors, as though God were making his appeal through us. We implore you on Christ’s behalf: Be reconciled to God. 21 God made him who had no sin to be sin for us, so that in him we might become the righteousness of God. (from 2 Cor. 5)
It seems like someone who is so fixated on faith would have some faith that God is faithful to finish what He starts!
6 And I am sure [have faith that] of this, that he who began a good work in you will bring it to completion at the day of Jesus Christ. (from Philippians 1)
-JGIG