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As Paul stated to the messianic Hebrews in his letter, The gospel Paul presented is in every way the same that Moses presented; the difference in effectiveness being due to the unbelief of those lost in the desert.
New Testament faith is Old Testament faith improved with belief reinforced with knowledge of the fulfillment of the perfect sacrifice.
Before Yehova sent the Roman army to remove the temple, that was the sole difference. The writings of Irenaeus make this perfectly clear. The “Teaching” (Torah) was the heart of the faith.
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Thanks for both of your responses. I will try to spend some time on this late this evening. If you might give me the direct reference to Irenaeus, it would help. I am fairly certain that I have all of his writings here at work, but I would only want to bring one volume home.