The old covenant had a glory, and this is seen when Moses received the law. His face shone so brightly that he had to wear a veil to cover his face.
This represents the glory of the old covenant. Its glory is that it brought to us the knowledge of God’s holiness and our sin. Through the law people would be conscious of their need of a Saviour.
The new covenant has a glory that surpasses that of the old covenant, and brings a fuller revelation of God’s character. “The law was given through Moses, but grace and truth came through Jesus Christ”(Jn.1:17).
If Moses’ face shone so brightly that people could not look upon it, and yet the covenant he brought ministered condemnation, how much more glorious will the new covenant that brings righteousness be? If there was glory in that which brought death, how much more glory is there in that which ministers righteousness and life?