Earlier in his letter, Paul encouraged Titus to both talk and walk in a manner worthy of the name we bear, and in 2.7-8, this theme comes up again.
Show yourself in all respects to be a model of good works, and in your teaching show integrity, dignity, and sound speech that cannot be condemned, so that an opponent may be put to shame, having nothing evil to say about us.
Titus is called to be the example (show yourself) as well as to be the teacher (and in your teaching). Simply, he needs to both talk the talk, and walk the walk. Titus was not going to be taken seriously if he simply gave instruction in sound doctrine (1.9) but then lived a life that contradicted this.
It would be impossible for Titus to lead (1.5) if he was not sure, steady, and consistent in his understanding and teaching of Scripture (in your teaching show integrity, dignity…). Those called to lead and teach God’s people must have a firm grasp of a true and orthodox interpretation of God’s Word.
Given that we are all to be working towards the character of Titus and the elders already detailed, we really all ought to be taking seriously the exhortation Paul gave to talk and walk in such a manner that an opponent may be put to shame, having nothing evil to say about us.
How we all behave individually reflects on us all, the Christian collective.
Today then – are we both talking the talk and walking the walk? What does my conduct and character say about my Christianity?