Synopsis of the Books of the Bible, by John Nelson Darby, [1857-62], at sacred-texts.com
Genesis Chapter 27
Jacob's history now begins [See Note #1]. Heir of the promises, and valuing them, he uses means to have them, evil and low in character. God answers his faith, and chastens his evil and unbelief. God could have brought the blessing in His own way (or made Isaac cross his hands as He did Jacob); Jacob, led by his mother, followed his own way, and did not wait for God. But the blessing was prophetic, and not to be recalled. The ways of God and His purpose were not to be changed. Isaac was guilty, and Jacob more so: all was overruled to answer faith and chasten evil in the believer. Esau had deliberately given up the right, when he had the choice: God was not in his thoughts: he cannot receive the blessing when the consequences are there. Man must act by faith alone, when the consequences are not seen, in order to be blessed, when the time for blessing comes.
Note #1
In general, Abraham is the root of all promise and the picture of the life of faith: Isaac, of the heavenly man, who receives the church; and Jacob, of Israel, heir of the promises according to the flesh.