Genesis 28:4

and give thee the blessing of Abraham, to thee, and to thy seed with thee; that thou mayest inherit the land wherein thou art a stranger, which God gave unto Abraham. The words of Isaac unmistakably point to the fact that he now openly recognized Jacob as the chosen heir. The consciousness of his patriarchal calling was awakened in him, and he had the strength to give the blessing of Abraham, which included the Messianic promise, to the son whom he would have rejected, but whom God had chosen.