What does the Bible say about Jesus being the head of the church?

The concept of Jesus as the head of the church is rooted in passages like Ephesians 1:22-23, which states that God gave Him to be the head over all things to the church, which is His body. This means that Christ is the sovereign leader and source of life for the church. Just as a head controls the body, Jesus leads His people and unites them spiritually. The significance of His headship is crucial as it reinforces the sovereign grace in salvation, where all believers are connected to Him as their representative and advocate before God.