This document is a summary of a sermon given on Ephesians 4:17-32. The sermon discusses how believers should walk differently than non-believers, putting off their old sinful nature and putting on their new identity in Christ. It encourages believers to eliminate backbiting, gossip and other behaviors that hurt the church. It explains that Ephesians teaches how God builds a new society based on truth that must be both heard and obeyed. The sermon uses the example of cigarette warnings to illustrate how believers cannot just hear doctrine but must live it out. It then examines how Ephesians teaches Christians how to walk at home, before other believers, and before the world.