Iouae, read the letter to the Galatians with a little more seriousness and you will understand what I am talking about. And if you want to understand about the Pauline policy of Replacement Theology, read Galatians 4:21-31 and we can talk about it.
Paul loves his "allegories" (Gal 4:24).
Me, not so much.
Later in this thread I hope to show how Paul forces his comparisons to make them fit.
In Gal 4 Paul has chosen two women/mountains/children to illustrate the OC and NC.
Hagar (the slave woman)/mt Sinai/Ishmael represents the OC. Already I feel it does not fit.
Sarah/New Jerusalem/Isaac represents the NC.
Notice Paul has to invent a mountain called New Jerusalem.
The theme seems to be freedom. Sarah is a free woman, "Jerusalem which is above is free" (Gal 4:26), and Isaac is free. Thus, the logical deduction is that those under the NC are free. Those free are also the promised/prophesied/blessed children.
Christ came to set us free (presumably from death).
Under the OC, there was no promise of eternal life, only temporal blessings.
Presumably Christians are also free from the wages of sin, which is death.
Frankly, Paul has a very convoluted way of thinking and comparing things, and, like I said, forcing comparisons.
Presumably Ishmael had no real future. He was discarded (vs 30) after persecuting the promised son (vs 29). The OC persecuted the NC. The OC/Ishmael was cast out when the NC/Isaac was in place.
The allegory is diminishing the OC and praising the NC as being the better one, which was promised all along.
This all made sense to Paul. None of us living today would ever have chosen to compare the OC and the NC using this analogy.
I might have used an analogy such as "Encyclopaedias were fine until the internet came along. Now the internet (NC) has set us free from the limitations imposed by an encyclopaedia (OC)".