For the grace of God has appeared that offers salvation to all people. It teaches us to say “No” to ungodliness and worldly passions, and to live self-controlled, upright and godly lives in this present age, while we wait for the blessed hope—the appearing of the glory of our great God and Savior, Jesus Christ, 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.
Much much Christianity, I’ve seen over the years. And grace has been sprinkled on all of that. First though, it would be good to give a definition or description of grace. Grace is God’s gift and favor to those who don’t deserve it, and could never earn it. Back to the original thought: Christianity is New Testament Christianity insofar as it is imbued with grace. And to understand that, we need to contrast it the same way the New Testament itself contrasts it: with law.
The law condemns us, because none of us lives up to its demands, or even can do so. The law ultimately points us to our need for a Savior. And that’s where God’s grace come in through Jesus and the cross, Jesus’s death. It is on the basis of Jesus’s death, by that and that alone by which we can be saved. And that is God’s gift of grace to us received by us through faith (Ephesians 2:8-9). And as the Titus passage above makes clear along with the Ephesians 2 passage, that opens us up to a new life. But grace alone is the means to forgiveness and new life in and through Jesus.