Christians should be examples of doing what is good and encouraged to do what is good. No one would argue that, especially if you reflect on the eight references to “doing what is good” mentioned in the book of Titus.
Unfortunately, many Christians know what they are to do, but find it difficult to actually do it. In Titus 3:1 Paul writes about being ready to do whatever is good. In other words, we are to be prepared. This is a process. The older generation can share what they have learned from experience. This helps Christians picture what, doing what is good, looks like in actual experience.
Being pure, for example, means being careful about what you watch. It also means taking care of what you listen to. Who you associate with is also important. What do you think about, when you don’t have to be thinking about something in particular.
What does integrity look like? Being a person of your word? Being the same when the boss is present or absent? Being willing to sacrifice, if necessary, to stand for what is right?
When older Christians share their experiences it’s easier to get yourself ready than if you are merely taught theory. The greatest source of enablement, however, is the power of the gospel of grace. Notice in Titus 2 and 3 two references regarding doing what is good follow in depth discussions of doctrine: in chapter two, the doctrine of the return of Jesus Christ and in chapter 3, the doctrine of Salvation.
Being saved by God’s grace and anticipating the Savior’s return are enabling factors in doing what is good.