Why is Jesus called the God-man mediator?

The term 'God-man mediator' refers to Jesus Christ's dual nature as both fully God and fully man. This unique combination is essential for the effectiveness of His redemptive work. As God, He possesses the power to save; as a man, He can represent humanity and bear the judgment for sin. The scriptures convey that only a mediator with both natures can effectively bridge the gap between God and man, thus fulfilling God’s law and providing atonement for sins. In Romans, for instance, it is expressed that one man's disobedience brought sin, but through Christ's obedience, many are made righteous, highlighting the necessity of His role as the God-man.