In Titus 2:9-10, Paul instructs slaves about being submissive to their masters in everything. He ends his counsel to them as follows: slaves should be “showing all good faith, so that in everything they may adorn the doctrine of God our Savior.”
Adorn is clearly the key word. To adorn means to put something in order, to decorate it, make it look good. In this case, slaves don’t make the doctrine good; the doctrine is good. But they can and should live in such a way as to make it look good. If slaves live by faith, they show the beauty of the truth about God our Savior.
What does adorning the doctrine do? It makes it look good. But why does that matter? Because we want other people to want it. Showing that something is attractive should attract. An appealing life draws others in.
By way of application, our worship of God the Savior should be attractive as well. The way we sing should make others pay attention. The way we feast from a good meal of God’s Word should make them hungry. The way we fellowship around the Lord’s Table should make them want in. This is a built-in feature when we worship well.