How do we know the authority of Christ is true?

The sovereignty of Christ is a key doctrine in Reformed theology, highlighting His absolute authority over heaven and earth. References such as Matthew 28:18, where Jesus states, 'All authority in heaven and on earth has been given to me,' affirm His divine sovereignty. Furthermore, the effectiveness of His redemptive work—delivering believers from the curse of the law and sin—exemplifies His authority. This truth is foundational for believers as it assures them that Christ reigns with power and that their deliverance is secure in Him. This recognition calls for gratitude and a response of faith as believers live under His lordship.