Right, however, God promised Abram and Sarai that they would bear a child in their old age, together.
The promise that Sarah would have a child was after Hagar had already born them a child. Yes, you could say that he promised it in his old age, because he was already old. So this next part…
Ten years go bye, and Sarai, not trusting God’s promise, takes matters into her own hands and tells Abram to have intercourse with Hagar.
Doesn’t apply. If you are talking about his promise to Abram, in Gen 15:4. The promise was not to Sarai, it was to Abram from his loins, no mention is made of Sarai or old age (though he was pretty old at the time of that promise and it was his concern that his only posterity would be that of his head house servant.
I am not disagreeing that “This was Sarai’s actions…” but you have no proof that it was " not God’s" actions. In fact, after that Abram had taken Hagar to wife, the Lord blessed him and covenanted with him is evidence that God condoned it.
Abram, Sarai, Hagar and Ishmael then live in the expectation that Ishmael is the child that God promised, which is of course, not true. It is the child that Sarai arranged to come into the world via her own plans and ambitions, of which Abram cooperated with with. But Ishmael was not the fulfillment of God’s promise…
Yes and no. I’d only be nit picking here so I’m not going to discuss this unless you think it adds to your argument. Their expectations have no bearing on polygamy.
Years later, God makes his covenant with Abram, changing his name to Abraham and his wife’s name to Sarah. Telling them, again, that Sarah will have a son. The shock is throughout the following passages. Abraham’s response indicates he is worried about the fate of Ishmael, who but moments before he believed was the child that would be blessed by God. Now, what is the fate of this child? What can a father do but ask God have favor on this child? How bigger of a thing is it to ask when you KNOW that this child is a product of your lack of faith and trust in God?
He was not concerned about the Ishmael, he was concerned about the welfare of his wife bearing a child in her old age. In effect, he was suggesting that the blessings could fall on Ishmael and spare Sarah the burden, but God would not have it. Verse 17, which you skipped, clearly shows his concern for his wife and gives all the reason for his statement in verse 18.
Genesis 17
18
So Abraham said to God, “If only Ishmael could live in your favor!”
Why would Abraham worry that Ishmael was not in God’s favor, if he believed something was right about the whole situation?
God then says, again, that Abraham and Sarah will have a child. Which is the promise made, and not believed by Sarah earlier in her life. Where she then contrived to make a promise of God come to pass without God.
Nothing in the scriptures supports this claim. Sarah’s only disbelief was when she heard that she’d give birth and she was already 90.
19
God replied: Even so, your wife Sarah is to bear you a son, and you shall call him Isaac. It is with him that I will maintain my covenant as an everlasting covenant and with his descendants after him.
God then shows mercy to Abraham and shows that his prayer for Ishmael has not gone unheard:
20
Now as for Ishmael, I will heed you: I hereby bless him. I will make him fertile and will multiply him exceedingly. He will become the father of twelve chieftains, and I will make of him a great nation.
But again, makes it clear that the covenant with Abraham and his descendants will be maintained through Isaac, who is the promised child from God, and not the child that came from Sarah’s unfaithfulness to God.
21
But my covenant I will maintain with Isaac, whom Sarah shall bear to you by this time next year.
Beyond that, Sarai’s choices brought discord into the home. Jealousies and complications to heredity that would not have been there, had Abraham and Sarah trusted God and remained true to each other. Bringing Hagar into the mix solved nothing, and was not the means to make a promise of God come to pass, without God.
Sarai and Abram acted on their own, in an attempt to fulfill a promise of God. “Oh look, Abraham has a child, God’s promise is fulfilled.” NOT! Obviously, this whole extramarital relationship was unnecessary, and was not commanded by God, as evidenced by Isaac.
Yes. And one would wonder why God would continue his promises through such a despicable man? It’s certainly enough to claim that Joseph Smith wasn’t a prophet. How then can Abraham still be a prophet after such a dastardly deed which brought only disharmony in the group and then was repeated yet again by his grandson and then by the whole house of Israel?
Probably because it wasn’t a dastardly deed and because God did condone it and continued to condone it for thousands of years, even including it in the Levitcal law.
I don’t believe Sarah was doing anything but trying to provide her husband an heir. She was not trying to fulfill any promise that God made to Abraham, and nothing that God said indicated that Sarah was to be the mother of that heir after Ishmael was born. It seed of promise was to be from Abraham’s loins. For all Sarah knew, Abraham would get married after she died and have a child by the next wife (which I believe he did). God reserved the honor of the blessings to go through the child of Sarah and Abraham. Such mercy for such sinful wicked people.