Illustration for Ephesians 5:13-14 
(Available in the Downloadable Teaching Ideas)

We know that light can be used to expose various cancers. Dentists now use a special light called a Visually Enhanced Lesion Scope (VELScope). Because changes in the natural fluorescence of healthy tissue generally reflect changes indicative of developing tumor cells, the VELScope allows dentists to shine a light onto a suspicious sore in the mouth, look through an attached eyepiece and watch directly for changes in color. Healthy oral tissue emits a pale green fluorescence, while potentially early tumor, or dysplastic, cells appear dark green to black. – Source: https://www.colgate.com/en-us/oral-health/conditions/cancer/ada-07-optical-device

• Consider what happens when you interact with people who learn that you are a Christian. What happens when they begin using bad language, telling dirty jokes, or discussing things that aren’t appropriate? (They will either ridicule you or apologize to you; either way, the light of Christ in you is exposing their sin.)
• When we are growing in our love for Christ by learning and living God’s Word, it will not only expose in us things that need to be changed, but our lives will expose the sin of those we encounter.