The second chapter of Titus is chock full of practicality and the glorifying of the grace of God. God's grace, made known to us through the sacrifice of Jesus, is the power and resource available to us for godly living. We simply cannot sustainably obey the commands of God without the power of God Himself. Jesus Himself depended upon the Father throughout His earthly ministry. We cannot expect less for ourselves.
In all of our relationships, as well as in our interfacing with this world, it is His grace that impacts, empowers and instructs us how to conduct ourselves. As someone well put it: "We are not human beings merely having a spiritual experience. We are spiritual beings having a human experience." And oh, how we need God's grace for it!