'Esau was a son of forty years' means a state of temptation as regards the natural good of truth. 'And he took for a wife Judith the daughter of Beeri the Hittite, and also Basemath the daughter of Elon the Hittite' means the wedding to it of natural truth from a source other than genuine truth itself. 'And they were a bitterness of spirit to Isaac and Rebekah' means that this led at first to grief.