What does it mean that Jesus is our eternal covenant mediator?

Hebrews 7:22 declares Jesus as the mediator of a better covenant, which signifies that He fulfills the requirements of God’s law on behalf of His people. Unlike the old covenant based on conditional obedience, this new covenant is rooted in grace and unconditional promise, entirely dependent on Christ’s mediating work. His sacrificial death addresses our inability to keep the law, freeing us from condemnation and granting us eternal life, a core tenet of Reformed theology emphasizing God's sovereign grace.