I love how Paul starts this second chapter of Titus. (All quotes are from Titus 2.)
1 You, however, must teach what is appropriate to sound doctrine.
The "however" is because Paul just finished listing the foul deeds of those who claim to know God, but in action deny Him. Now, Paul turns to telling Titus what needs to be done in these churches.
Paul does not tell Titus to give the Cretans sound doctrine.
Titus is to teach what is appropriate to sound doctrine.
The Cretans appear to have enough sound doctrine. They need no more. Now, they need to know the things that spring from sound doctrine.
On the one hand, it looks like I am reading to much significance into the text, but I don't think I am. Paul might have good reason to be worried about Titus reinforcing the doctrine of grace in Crete. It is the people of the circumcision, the Judaizers, who are spreading meaningless talk, and deception, and making money at it to boot. Paul could have asked Titus to go in there and straighten the errors of the Judaizers out again.
Paul is silent on the whole subject.
The Cretans must know enough about grace, or Paul would be addressing that issue. Instead, Paul spends ALL of chapter 2 talking about deeds. Old men, old women, young men, young women, and slaves are all addressed. They are told to be reverent, good, self-controlled, sound and trustworthy.
These things become sound doctrine. In doing these things, Paul says:
10 ... so that in every way they will make the teaching about God our Savior attractive.
That's a goal!
Finally, though, Paul does get theological - toward the end of the chapter, right?
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.
Paul still is not worried about doctrine.
Paul is still moving Titus to the things that matter. Doctrine is good, but there is an end to doctrine. Works of love do not end. Evidently, Paul was a little worried that the focus on works might upset some people, because he finishes the thought with these words.
15 These, then, are the things you should teach. Encourage and rebuke with all authority. Do not let anyone despise you.
So far, in chapter 1 we have seen the outward signs of the kind of character that enable a leader to be effective in the church. In chapter 2 we have seen that the leader's primary goal is to encourage character in those he leads.
Maybe chapter 3 will be about the importance of right doctrine?