"There Is One Body..." Eph. 4:4a. The Bible says “There is one body...” (Ephesians 4:4). What is the one body? The book of Ephesians answers the question: “And hath put all things under his feet, and gave him to be the head over all things to the church, Which is his body, the fulness of him that filleth all in all.” (Eph. 1:22-23). In Ephesians, Paul is teaching exactly the same thing the Lord Jesus Christ taught. Our Lord said He would build His church: "...I will build my church; and the gates of hell shall not prevail against it..." (Matthew 16:18). ...