27:1-5 The promises of the Messiah, and of the land of Canaan, had come down to Isaac. Isaac being now about 135 years of age, and his sons about 75, and not duly considering the Divine word concerning his two sons, that the elder should serve the younger, resolved to put all the honour and power that were in the promise, upon Esau his eldest son. We are very apt to take measures rather from our own reason than from Divine revelation, and thereby often miss our way.
4. make … savory meat—perhaps to revive and strengthen him for the duty; or rather, "as eating and drinking" were used on all religious occasions, he could not convey the right, till he had eaten of the meat provided for the purpose by him who was to receive the blessing [Adam Clarke] (compare Ge 18:7).
that my soul may bless thee—It is difficult to imagine him ignorant of the divine purpose (compare Ge 25:23). But natural affection, prevailing through age and infirmity, prompted him to entail the honors and powers of the birthright on his elder son; and perhaps he was not aware of what Esau had done (Ge 25:34).