There are times preaching through the Gospel of Luke (and many other places throughout the Scriptures, for that matter) when we are forced to monitor our spiritual progress. For instance, in Luke 11:28 Jesus says, “Blessed…are those who hear the word of God and keep it!” The rest of the paragraph describes in general terms, through the imagery of light and darkness, what it’s like when we allow Jesus’ teaching to enlighten every area of our sin-infected hearts.

I found it helpful to create a slide that lists some prominent sins. I wanted us to ask if we commit these sins just as much as the non-Christian. You don’t have to use a slide. You could use a handout or simply read the list to your hearers. The key is to somehow help the faith-family monitor their level of obedience. Are we hearing the word of God and keeping it? How do we know?

Take the same list and transform it into LifePlus character traits. It’s easy now to ask which list, or, more likely, which one(s) on the two lists best describe us.

The Bible forces us to evaluate our lifestyle to help us be sure our faith in Christ is living. This approach is not the only way, but I’ve found I can get a lot of mileage out of these contrasting lists.

If you desire to stay away from moralistic preaching, simply remind everyone that Jesus died in literal darkness (Luke 23:44ff.) so we could be “full of light” (Luke 11:34). The second slide describes the genuine Believer. It’s the difference between a morally restrained heart and a supernaturally changed heart.

Preach well for the sake of God’s reputation in the Church and in the world.

This post originally appeared on March 3, 2014.