How do we know Christ's role as a mediator is true?

The truth of Christ's mediatorial role is grounded in Scripture and illustrates the fullness of the Gospel. According to Hebrews 9:15, 'For this cause, he is the mediator of the New Testament,' signifying that His role is divinely instituted. His qualifications as both God and man are paramount: only He can adequately represent both parties—God, who requires absolute holiness, and humanity, which is fallen and sinful. His sacrificial death validates His position, demonstrating that He is able to stand in the gap and intercede effectively for those chosen by God. Thus, His mediatorship is pivotal in fulfilling the requirements of divine justice while extending grace to His people.