Genesis 17:15 And God said unto Abraham, As for Sarai thy wife, thou shalt not call her name Sarai, but Sarah shall her name be. 16 And I will bless her, and give thee a son also of her: yea, I will bless her, and she shall be a mother of nations; kings of people shall be of her.
Isaac, who would be the son of a miracle, was to be one of the progenitors of Christ, and therefore, the timing of his birth would have serious consequences downstream. In other words, Isaac’s birth would not only affect the time Christ’s birth, it would also have a direct impact on the future prophecies of Daniel. And all of the subsequent progenitors in between would be also directly affected in the stream of time if Isaac was to be born one day earlier, or one day later.
The timing of his birth brought a multitude of other factors into play, for it would affect the 2300- day prophecy we so often like to refer to. It would also affect the date of the exodus from Egypt. Rebekah, who was to be Isaac’s future wife must be in place, so that when Abraham and Isaac prayed to God for a wife, she would just happen to be there at the well in the nick of time. If Isaac was to be brought upon the stage of action some years ahead of his time, the perfect wife God was preparing for him would only be a little girl at the time he would be looking for a wife.
All of these factors are brought into the equation in God’s planning, and therefore, for us mortals to be in a haste, or try to hurry up God, will actually be an attempt to alter His perfect planning. After all was said and done, after all the supposed delay, Isaac’s birth was to culminate in the following verses.
Genesis 17:17 Then Abraham fell upon his face, and laughed, and said in his heart, Shall a child be born unto him that is an hundred years old? and shall Sarah, that is ninety years old, bear? 18 And Abraham said unto God, O that Ishmael might live before thee! 19 And God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his seed after him.
May The Lord add His blessing to the study of His word. God bless!