Sound doctrine obeyed and godliness lived are the ways the children of God are to act. Paul urges Titus to remind his congregations and elders of the importance of maintaining good works. Never for salvation, but of salvation.
Godliness flourishes in men when sound doctrine is rightly preached in their pulpits and practiced in their homes. Paul tells Titus to speak sound doctrine, exhorting and reproving with all authority. Paul outlines sound doctrine for Titus and for the church today, what it is and what it does.