One who links or reconciles separate or opposing parties. Thus Jesus Christ is the "one mediator between God and the human race" (1 Tm 2:5). Through his sacrificial offering he has become high priest and unique mediator who has gained for us access to God's saving grace for humanity. Moreover, Mary too is sometimes called Mediatrix in virtue of her cooperation in the saving mission of Christ, who alone is the unique mediator between God and humanity (618, 1544; cf. 970).