185. But this is what Cain, no doubt, strove to hinder in various ways. He set up new forms of worship and invented numerous ceremonies, that thereby he might also appear to be the Church. Those, however, who departed from him and joined the true Church, were saved, although they were compelled to surrender the distinction that Christ was to be born from their flesh and blood. But let us now return to the text.
186. Moses here uses a very striking personification. He represents the earth as a dreaded beast when he speaks of her as having opened her mouth and swallowed the innocent blood of Abel. But why does he treat the earth so ruthlessly since all this was done without her will? Yes, being a creature of God which is good, did not all transpire in opposition to her will and in spite of her struggle against it, according to Paul's teaching: "The earth was made subject to vanity, not willingly," Rom 8, 20. My reply is: The object was to impress Adam and all his posterity, so that they might live in the fear of God and beware of murder. The words of Adam have this import "Behold the earth hath opened her mouth and swallowed the blood of thy brother; but she ought to have swallowed thee, the murderer. The earth is indeed a good creature, and is good to the good and godly; but to the wicked she is full of pitfalls." It is for the purpose of inspiring murderers with fear and dread that these terrifying words were spoken. Nor is there any doubt that Cain, after hearing the words from an angry father, was overwhelmed with terror and confusion, not knowing whither to turn. The expression, "which hath opened its mouth to receive thy brother's blood from thy hand," is, indeed, terrifying, but it portrays the turpitude of the fratricidal deed better than any picture.
V. 12a. When thou tillest the ground, it shall not henceforth yield unto thee its strength.
187. The Lord said above to Adam, "Thorns also and thistles shall it bring forth to thee." But the words spoken to Cain are different. As if he had said, "Thou hast watered and fertilized the earth, not with healthful and quickening rain, but with thy brother's blood. Therefore the earth shall be to thee less productive than to others. For the blood thou hast shed shall hinder the strength and the fruitfulness of the earth." This material curse is the second part of the punishment. The earth, although alike cultivated by Adam and Cain, should be more fruitful to Adam than to Cain and yield its return to the former for his labors. But to the labors of Cain it should not yield such returns, though by nature desirous to give in proportion to its fruitfulness and strength, because it was hindered by the blood spilled by Cain.
188. Here we must offer a remark of a grammatical nature. In the present passage Moses terms the earth haadama. In the passage following, "A fugitive and a wanderer shalt thou be in the earth" he uses the term arez. Now adama signifies, according to grammatical interpreters, that part of the earth which is cultivated, where trees grow and other fruits of the earth adapted for food. But arez signifies the whole earth, whether cultivated or uncultivated. This curse, therefore, properly has reference to the part of the earth cultivated for food. And the curse implies that where one ear of wheat brings forth three hundred grains for Adam, it should bring forth scarcely ten grains for Cain the murderer; and this for the purpose that Cain might behold on every side God's hatred and punishment of the shedding of blood.
V. 12b. A fugitive and a wanderer (vagabond) shalt thou be in the earth.