How do we know Christ's headship is true?

The truth of Christ's headship can be established through various passages that reveal His role as the representative of the elect. Romans 5:14 draws a parallel between Adam, who represents all humanity, and Christ, who represents the elect. This same representation speaks to the nature of Christ's role in fulfilling the demands of the law and securing salvation for His people. Additionally, Ephesians 1:3-4 highlights that believers are blessed in Christ and chosen in Him before the foundation of the world, supporting the notion that His headship is an eternal truth reflected in the covenant established between God and His people. Hence, the biblical affirmation of Christ as the federal Head evidences His centrality in salvation and the security it affords the elect.