Paul is drawing a comparison between the old covenant, represented by the law given to Moses, and the new covenant established through Jesus Christ. The old covenant, while glorious in its own right, was temporary and served as a precursor to the greater revelation to come. It was characterized by laws and rituals that pointed towards the need for a more profound, spiritual transformation. The new covenant, however, is marked by the indwelling of the Holy Spirit, offering believers a more intimate and lasting connection with God.
This verse emphasizes the superiority of the new covenant's glory, which is eternal and transformative. It invites believers to embrace the freedom and life that come from the Spirit, as opposed to the letter of the law. The enduring nature of the new covenant assures Christians of a continual, growing relationship with God, marked by grace and truth. This passage encourages a shift in focus from the temporary to the eternal, urging believers to live in the light of the lasting glory that comes through faith in Christ.