"The blessing which Isaac gave to his older son was bound to no condition whatsoever. Whether he deserved them or not, Esau was to enjoy the goods of this world. Jacob's blessing, however, depended upon his pious deeds; through them he would have a just claim upon earthly prosperity. Isaac thought: "Jacob is a righteous man, he will not murmur against God, though it should come to pass that suffering be inflicted upon him in spite of his upright life. But that reprobate Esau, if he should do a good deed, or pray to God and not be heard, he would say, 'As I pray to the idols for naught, so it is in vain to pray to God.' " For this reason did Isaac bestow an unconditional blessing upon Esau."