For the last 3 1/2 chapters the writer of Hebrews has been constantly contrasting the 2 covenants. Hammering his point home because after all, repetition is the mother of learning. He has repeatedly shown how the Old covenant was just a shadow, a picture of what was to come. And of course, it came in the life, ministry, death, and resurrection of Jesus Christ.
This Sunday after spending 3 1/2 chapters to prove his point of the superiority of Jesus Christ over the Old Covenant, he will conclude his teaching on this extremely important subject of the High Priestly ministry of our Lord and Savior Jesus Christ. It's not that the O.T. was useless (it certainly wasn't) But it was completely fulfilled by Jesus Christ (Messiah), which now makes the Old covenant obsolete when it comes to salvation
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