Adam Clarke Bible Commentary

And Isaac trembled - The marginal reading is very literal and proper, And Isaac trembled with a great trembling greatly. And this shows the deep concern he felt for his own deception, and the iniquity of the means by which it had been brought about. Though Isaac must have heard of that which God had spoken to Rebekah, The elder shall serve the younger, and could never have wished to reverse this Divine purpose; yet he might certainly think that the spiritual blessing might be conveyed to Esau, and by him to all the nations of the earth, notwithstanding the superiority of secular dominion on the other side. Yea, and he shall be blessed - From what is said in this verse, collated with Heb 12:17, we see how binding the conveyance of the birthright was when communicated with the rites already mentioned. When Isaac found that he had been deceived by Jacob, he certainly would have reversed the blessing if he could; but as it had been conveyed in the sacramental way this was impossible. I have blessed him, says he, yea, and he must, or will, be blessed. Hence it is said by the apostle. Esau found no place for repentance, μετανοιας γαρ τοπον ουχ εὑρε, no place for change of mind or purpose in his father, though he sought it carefully with tears. The father could not reverse it because the grant had already been made and confirmed. But this had nothing to do with the final salvation of poor outwitted Esau, nor indeed with that of his unnatural brother.