How do we know that Christ is the mediator of the New Covenant?

Scripture reveals Jesus as the mediator of the New Covenant, affirming that God's communication with humanity is primarily through Him (Hebrews 1:1-2, Acts 3:22). In tying the New Covenant to Christ's fulfillment of the law and the prophets, believers are urged to heed His voice and follow His teachings (Hebrews 12:25). The emphasis on Christ's role as the mediator underscores why He is superior to Moses and the angels, removed from the traditions of the Old Covenant, and the true source of eternal grace for His people (Hebrews 10:19-20).