There is a sort of tension or intensity throughout the book of Hebrews as the author makes his case that Jesus Christ is in every way superior to the Mosaic covenant with its requirements, rituals, and sacrifices.
It’s not that the OT covenant of law, the historical tabernacle (or the temple), or the Levitical sacrifices were “bad”. God had initiated each of them at a certain point in time for special and holy purposes.
Yet, in reading the New Testament, we learn that each one of these, God intended to be a picture of His ultimate redemptive plan — finally and completely revealed only in Jesus Christ.
Christ’s atoning sacrifice is completely sufficient; it is the one and only sacrifice I will ever need; it is enough for all time and for all eternity; it is enough for God to remember my sins no more; and it is enough for full and free forgiveness!