What does the Bible say about Christ as the head of the church?

The Bible explicitly describes Christ as the head of the church in passages such as Ephesians 4:15, which states that Christ is the head from whom the whole body is joined together. This highlights His sovereign authority and role as the sustainer and nourisher of the church. As Christ fills all in all, He is actively overseeing the growth and maturity of believers, ensuring that they are equipped through His appointed ministers. His lordship guarantees that His church will prevail without interruption until all His elect are gathered together in unity.