Genesis 27:32

Who art thou? Jacob had scarcely received the blessing and left his father when Esau returned. The shock must have been crushing to Isaac. But, he apparently saw in the incident the intervention of Providence and concluded that any further attempt on his part to act contrary to God’s will would be futile. He knew he could not; therefore he would neither withdraw the blessing from Jacob nor seek to inflict a curse upon him. Isaac must have realized his own responsibility for the sad situation; why should he blame Jacob? As Esau had acted independently of his parents in the selection of a wife, so Isaac had acted independently of God in attempting to select his heir. Like Balaam, Isaac found himself powerless to turn away the blessing of God from one destined to receive it (see Num. 22:35; 23:8, 11, 12).