It is God who has only ONE Son, this many forget. Abraham had 7 sons. To say that the Jew is the son of God today would be to declare that God could have TWO sons and that these two would be equal in nature and substance. They were and are not!!! It was the Son on whom the inheritance rested by law!! The secret of Abraham’s seed was parentage, not only the father but also the mother. The seed which was not one but two, remember Adam could not pro-generate before Eve came from his side!! Anyone forgetting Sarai leaves out half of the equation. Sara was pre-selected, chosen and was not a condition of AWKWARD circumstance!! Sara was a free-woman which meant she was of royal heritage. 1 Peter 2:9 The difference was that the bondwoman was born after the flesh, the free woman was born of promise, prophecy. In the course of nature all would consider Ishmael possible whereas in the course of nature NO ONE would consider Isaac natural. Isaac nor Christ were not in the usual manner, born. The Jew is born by natural law, not by the law of the Spirit!! Definitely shown in Galatians 4:22-26, Sara, because of circumstances not of her choosing cried out: “cast out the bondwoman and her son, for the son of the bondwoman shall not heir with the son of the free.” These mothers were allegorical, figurative (meant to teach a greater lesson), type and anti-type. They were not just any two women that existed-remember nothing is said of Keturah who was also a wife of Abraham! Only Sarah and Hagar were meant to typify, pre-figure, or prophesy two different covenants. Hagar was the covenant which came from Sinai (called Agar by the Arabians of that time) and was intended to prefigure Jerusalem which is of, from, prefigured, prophesied as coming from physical means. The other was Jerusalem (the Church of Christ) which has existed from, prefigured, prophesied to have already existed in the mind of God in heaven, for God married her to His Son in eternity, NOT TIMe!! “Sing O barren (one), thou that didst not bear; break forth into singing, and cry aloud, that that didst not travail with child, for more are the children of the desolate that the children of the married wife, saith the Lord.” Isaiah 54:1
We who are a part of the predetermined, prophesied church, like Isaac are apart of the predetermined, prophesied offspring, who depend on the Christ, not on the flesh!! They who were apart of the fleshly lineage depend on Isaac for their ancestry. Sarah was intended to prefigure Jerusalem which is from above. The Church of Christ came from the pre-existent abode of the Godhead and we became, in the state called marriage, Christians under the new and better dispensation of the covenant, which is, which can continue free from sin and the curse of the moral and ceremonial law, “as we walk in the Light.” 1 John 1:7-9 To this freedom and enlargement, which describes this gospel dispensation, typified by Sarah the mother of the promised seed, we have accepted Christ, and rely upon Him, and look for justification and salvation by Him ALONE, as hereby we become the spiritual, though we are not the natural, seed of Abraham, so we are entitled to the promised inheritance and have great interest in the blessings of that promise. They who are children of the King, who might stumble at the opposition one might meet with from the Jews, who were so tenacious of their law as to be ready to persecute those who would not submit to it, Paul tells us that this was pointed out in type; for”as then he that was born after the flesh persecuted Him that was born after the Spirit, we must expect it would be “so now.” So we would find comfort in the prophecies, we would know that Judaism would sink, and wither, and perish; but true Christianity should flourish and last forever!! TODAY, THERE ARE NOT TWO SONS!! The Jewish people as a whole never enjoyed the acceptance of the Father, only the association with the Son, never engaged the Holy Spirit in the trials of obedience and perfection, and made no claim on the heaven as the destiny of their souls.