Heb 10:9 then he added, “Behold, I have come to do your will.” He does away with the first in order to establish the second.
The writer is saying….you have got the new let go of the old . The Old had a purpose but new covenant is better. The old delivered by angels the New in a Son.
Many of the old principles carry over as far as morality issues and the holiness of God. But rituals , ceremonies, mosaic system and foreshadows are done away with ! Don’t mix the old with the new . The Jewish audience of the above text was trying to do that . Let’s learn from the word .
The law was good ..Grace is better!!!!

He is Better!!