In this sermon, Pastor Chris discusses Ephesians 4, focusing on the concept of 'in-reach' within the church. He explains that every church should balance both in-reach (internal discipleship) and outreach (evangelism). The passage details how God gave pastor-teachers to equip believers for ministry, with the goal of building up the body of Christ. This process continues until believers achieve unity in faith and knowledge of Christ, resulting in spiritual maturity that protects them from being swayed by false teachings.