On the Freedom of the Will
10 But since we acknowledge the God who spoke by Moses to be not only just, but also good, let us carefully inquire how it is in keeping with the character of a just and good Deity to have hardened the heart of Pharaoh. And let us see whether, following the example of the Apostle Paul, we are able to solve the difficulty by help of some parallel instances: if we can show, e.g., that by one and the same act God has pity upon one individual, but hardens another; not purposing or desiring that he who is hardened should be so, but because, in the manifestation of His goodness and patience, the heart of those who treat His kindness and forbearance with contempt and insolence is hardened by the punishment of their crimes being delayed; while those, on the other hand, who make His goodness and patience the occasion of their repentance and reformation, obtain compassion. To show more clearly, however, what we mean, let us take the illustration employed by the Apostle Paul in the Epistle to the Hebrews, where he says, “For the earth, which drinks in the rain that comes oft upon it, and brings forth herbs meet for them by whom it is dressed, will receive blessing from God; but that which bears thorns and briers is rejected, and is near unto cursing, whose end is to be burned.” Now from those words of Paul which we have quoted, it is clearly shown that by one and the same act on the part of God— that, viz., by which He sends rain upon the earth— one portion of the ground, when carefully cultivated, brings forth good fruits; while another, neglected and uncared for, produces thorns and thistles. And if one, speaking as it were in the person of the rain, were to say, “It is I, the rain, that have made the good fruits, and it is I that have caused the thorns and thistles to grow,” however hard the statement might appear, it would nevertheless be true; for unless the rain had fallen, neither fruits, nor thorns, nor thistles would have sprung up, whereas by the coming of the rain the earth gave birth to both. Now, although it is due to the beneficial action of the rain that the earth has produced herbs of both kinds, it is not to the rain that the diversity of the herbs is properly to be ascribed; but on those will justly rest the blame for the bad seed, who, although they might have turned up the ground by frequent ploughing, and have broken the clods by repeated harrowing, and have extirpated all useless and noxious weeds, and have cleared and prepared the fields for the coming showers by all the labour and toil which cultivation demands, have nevertheless neglected to do this, and who will accordingly reap briers and thorns, the most appropriate fruit of their sloth. And the consequence therefore is, that while the rain falls in kindness and impartiality equally upon the whole earth, yet, by one and the same operation of the rain, that soil which is cultivated yields with a blessing useful fruits to the diligent and careful cultivators, while that which has become hardened through the neglect of the husbandman brings forth only thorns and thistles. Let us therefore view those signs and miracles which were done by God, as the showers furnished by Him from above; and the purpose and desires of men, as the cultivated and uncultivated soil, which is of one and the same nature indeed, as is every soil compared with another, but not in one and the same state of cultivation. From which it follows that every one's will, if untrained, and fierce, and barbarous, is either hardened by the miracles and wonders of God, growing more savage and thorny than ever, or it becomes more pliant, and yields itself up with the whole mind to obedience, if it be cleared from vice and subjected to training.
11. But, to establish the point more clearly, it will not be superfluous to employ another illustration, as if, e.g., one were to say that it is the sun which hardens and liquefies, although liquefying and hardening are things of an opposite nature. Now it is not incorrect to say that the sun, by one and the same power of its heat, melts wax indeed, but dries up and hardens mud: not that its power operates one way upon mud, and in another way upon wax; but that the qualities of mud and wax are different, although according to nature they are one thing, both being from the earth. In this way, then, one and the same working upon the part of God, which was administered by Moses in signs and wonders, made manifest the hardness of Pharaoh, which he had conceived in the intensity of his wickedness but exhibited the obedience of those other Egyptians who were intermingled with the Israelites, and who are recorded to have quitted Egypt at the same time with the Hebrews. With respect to the statement that the heart of Pharaoh was subdued by degrees, so that on one occasion he said, “Go not far away; you shall go a three days' journey, but leave your wives, and your children, and your cattle,” and as regards any other statements, according to which he appears to yield gradually to the signs and wonders, what else is shown, save that the power of the signs and miracles was making some impression on him, but not so much as it ought to have done? For if the hardening were of such a nature as many take it to be, he would not indeed have given way even in a few instances. But I think there is no absurdity in explaining the tropical or figurative nature of that language employed in speaking of “hardening,” according to common usage. For those masters who are remarkable for kindness to their slaves, are frequently accustomed to say to the latter, when, through much patience and indulgence on their part, they have become insolent and worthless: “It is I that have made you what you are; I have spoiled you; it is my endurance that has made you good for nothing: I am to blame for your perverse and wicked habits, because I do not have you immediately punished for every delinquency according to your deserts.” For we must first attend to the tropical or figurative meaning of the language, and so come to see the force of the expression, and not find fault with the word, whose inner meaning we do not ascertain. Finally, the Apostle Paul, evidently treating of such, says to him who remained in his sins: “Despise the riches of His goodness, and forbearance, and long-suffering; not knowing that the goodness of God leads you to repentance? But, after your hardness and impenitent heart, treasurest up unto yourself wrath on the day of wrath and revelation of the righteous judgment of God.” Such are the words of the apostle to him who is in his sins. Let us apply these very expressions to Pharaoh, and see if they also are not spoken of him with propriety, since, according to his hardness and impenitent heart, he treasured and stored up for himself wrath on the day of wrath, inasmuch as his hardness could never have been declared and manifested, unless signs and wonders of such number and magnificence had been performed.
Source: De Principiis (New Advent)