Having spent much time exhorting different groups towards the character referenced in 1.6-9, Paul now underscores and underlines the whole thing with a powerful statement about grace.
For the grace of God has appeared, bringing salvation for all people, training us to renounce ungodliness and worldly passions, and to live self-controlled, upright, and godly lives in the present age, waiting for our 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 lawlessness and to purify for himself a people for his own possession who are zealous for good works.
We see a few powerful things about the grace of God.
First, it brings salvation for all people. All people. Period. None have works required of them. None have grace + anything else. The grace of God has appeared, bringing salvation for all people.
Second, it trains us to renounce ungodliness and worldly passions.
It trains us to live self-controlled, upright, and godly lives in the present age.
It trains us to wait for our blessed hope which is the appearing of the glory of our great God and Savior Jesus Christ.
It trains us. This carries the meaning of the training given from parent to child; lovingly guiding, correcting, confronting, and encouraging. Everything Paul has told Titus to teach up to now, and everything Paul will tell Titus to teach from now is rooted in the grace of God.
Today then, just pause and think – where is the grace of God training me? What am I being lovingly guided through? What is our loving Father in heaven guiding me through?