The Bible tells us that we’re all born with a nature that wants to live in opposition to God’s original intent. Because we’re born that way, we don’t see the problem with it. Once we become Christ followers the Holy Spirit shows us where we’re not lining up with God’s will. Pastor Mark is teaching that once that we have the light of Christ within us we are to shine that light to the unsaved world around us. We do that primarily by being obedient to God’s commands and sharing His love with others. The contrast will be so obvious that people will become curious why we’re different.