Genesis 27:39

But why was it after being "roughly handled" that Isaac gave his blessing? For in the last resort what Isaac said to Esau was spoken under constraint and force: "Behold, your dwelling will be by the fruitfulness of the earth and by the dew of heaven." And in case you should imagine yourself for that reason to be good—"You shall live by your sword and be servant to your brother." But in order that you shouldn't despair of yourself, since you can after all correct yourself—"But the time will come when you will put off and undo the yoke from your neck." There you are, he will receive of the fruitfulness of the earth and of the dew of heaven. But when Isaac is roughly handled, he throws this blessing at him. He does not give it to him. Doesn't it happen now in the church with evil people who want to cause trouble in the church that they are tolerated for the sake of peace, that they are admitted to share in the common sacraments? And sometimes it is public knowledge that they are evil, but for some reason or other they cannot be convicted of it. No proof or conviction can be obtained so that they may be corrected and removed from office, excluded, excommunicated. If someone presses charges, it sometimes comes to the disruption of the church. The church leader is forced in effect to say, "Here you are with the fruitfulness of the earth and the dew of heaven; make use of the sacraments; you are eating judgment to yourself, you are drinking judgment to yourself. "Whoever eats and drinks unworthily eats and drinks judgment to himself." "You know that you are being admitted to the sacraments for the sake of the peace of the church; all you have at heart is stirring up trouble and causing divisions. That is why you will live by the sword. For as to what you receive from the dew of heaven and the fruitfulness of the earth, you won't live by that.

Are the words spoken there by the blessed Isaac meant either as a blessing or as a prophecy? It is necessary to understand the previous statement. This is what he says: "By the fatness of the earth shall your dwelling be, and by the dew of heaven above." In fact, it happens that the people settled down in the land of the Canaanites, which they shared with Joshua, son of Nun.

But the great difference is, that there is nothing in Esau's blessing that points at Christ, nothing that brings either him or his into the church, and without that the fatness of the earth, and the plunder of the field, will stand him in little stead. Thus Isaac by faith blessed them both, according as their lot should be.

(1.) It was a good thing, and better than he deserved. It was promised him, [1.] That he should have a competent livelihood-- the fatness of the earth, and the dew of heaven. Note, Those that come short of the blessings of the covenant may yet have a very good share of outward blessings.