As Christians, the most joyful, encouraging, and gracious words should come from our mouths, yet we are often just as prone to grumbling, complaining, and murmuring as the rest of the world. In Philippians 2:14-18, Paul strongly cautions against this, reminding us that a joyful church is marked by believers who shine as lights in a dark world, point others to the Gospel of Jesus Christ, and rejoice in their salvation.