As for the sacrifices of my offerings, they sacrifice flesh and eat it; But Yahweh doesn't accept them. Now he will remember their iniquity, And punish their sins. They will return to Egypt.
A life lived after the flesh will bring a person to emptiness. Pursuing your own fleshly ambitions will not bring you satisfaction but only a deeper hunger that cannot be fulfilled. It'll yield no meal; it's all chaff. You go to eat it and there's no nourishment, there's nothing there. Life becomes empty like chaff.