How do we know the doctrine of the church being Christ's body is true?

The doctrine that the church is the body of Christ is deeply rooted in Scripture, particularly in 1 Corinthians 12:12-27, which describes believers as parts of one body with Christ as the head. This passage elucidates the interdependence and shared identity of believers, affirming that every individual, regardless of societal status within a church, is equally significant. Moreover, Matthew 16:18 highlights Christ’s promise to build His church, reinforcing that the church is a manifestation of His divine will and purpose. Thus, the authenticity of this doctrine is verified through its consistent biblical foundation that emphasizes the unity and shared mission of all believers in relation to their Lord.