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5. Because that Abraham obeyed my voice. Moses does not mean that Abraham’s obedience was the reason why the promise of God was confirmed and ratified to him; but from what has been said before, (Genesis 22:18,) where we have a similar expression, we learn, that what God freely bestows upon the faithful is sometimes, beyond their desert, ascribed to themselves; that they, knowing their intention to be approved by the Lord, may the more ardently addict and devote themselves entirely to his service: so he now commends the obedience of Abraham, in order that Isaac may be stimulated to an imitation of his example. And although laws, statutes, rites, precepts, and ceremonies, had not yet been written, Moses used these terms, that he might the more clearly show how sedulously Abraham regulated his life according to the will of God alone — how carefully he abstained from all the impurities of the heathen — and how exactly he pursued the straight course of holiness, without turning aside to the right hand or to the left: for the Lord often honors his own law with these titles for the sake of restraining our excesses; as if he should say that it wanted nothing to constitute it a perfect rule, but embraced everything pertaining to absolute holiness. The meaning therefore is, that Abraham, having formed his life in entire accordance with the will of God, walked in his pure service.

7. And the men of the place asked him. Moses relates that Isaac was tempted in the same manner as his father Abraham, in having his wife taken from him; and without doubt he was so led by the example of his father, that he, being instructed by the similarity of the circumstances, might become associated with him in his faith. Nevertheless, on this point he ought rather to have avoided than imitated his father’s fault; for no doubt he well remembered that the chastity of his mother had twice been put in great danger; and although she had been wonderfully rescued by the hand of God, yet both she and her husband paid the penalty of their distrust: therefore the negligence of Isaac is inexcusable, in that he now strikes against the same stone. He does not in express terms deny his wife; but he is to be blamed, first, because, for the sake of preserving his life, he resorts to an evasion not far removed from a lie; and secondly, because, in absolving his wife from conjugal fidelity, he exposes her to prostitution: but he aggravates his fault, principally (as I have said) in not taking warning from domestic examples, but voluntarily casting his wife into manifest danger. Whence it appears how great is the propensity of our nature to distrust, and how easy it is to be devoid of wisdom in affairs of perplexity. Since, therefore, we are surrounded on all sides with so many dangers, we must ask the Lord to confirm us by his Spirit, lest our minds should faint, and be dissolved in fear and trembling; otherwise we shall be frequently engaged in vain enterprises, of which we shall repent soon, and yet too late to remedy the evil.

8. Abimelech, king of the Philistines, looked out at a window. Truly admirable is the kind forbearance of God, in not only condescending to pardon the twofold fault of his servant, but in stretching forth his hand, and in wonderfully averting, by the application of a speedy remedy, the evil which he would have brought upon himself. God did not suffer — what twice had occurred to Abraham — that his wife should be torn from his bosom; but stirred up a heathen king, mildly, and without occasioning him any trouble, to correct his folly. But although God sets before us such an example of his kindness, that the faithful, if at any time they may have fallen, may confidently hope to find him gentle and propitious; yet we must beware of self-security, when we observe, that the holy woman who was, at that time, the only mother of the Church on earth, was exempted from dishonor, by a special privilege. Meanwhile, we may conjecture, from the judgment of Abimelech, how holy and pure had been the conduct of Isaac, on whom not even a suspicion of evil could fall; and further, how much greater integrity flourished in that age than in our own. For why does he not condemn Isaac as one guilty of fornication, since it was probable that some crime was concealed, when he disingenuously obtruded the name of sister, and tacitly denied her to be his wife? And therefore I have no doubt that his religion, and the integrity of his life, availed to defend his character. By this example we are taught so to cultivate righteousness in our whole life, that men may not be able to suspect anything wicked or dishonorable respecting us; for there is nothing which will more completely vindicate us from every mark of infamy than a life passed in modesty and temperance. We must, however, add, what I have also before alluded to, that lusts were not, at that time, so commonly and so profusely indulged, as to cause an unfavourable suspicion to enter into the mind of the king concerning a sojourner of honest character. Wherefore, he easily persuades himself that Rebekah was a wife and not a harlot. The chastity of that age is further proved from this, that Abimelech takes the familiar sporting of Isaac with Rebekah as an evidence of their marriage.³⁷³⁷     The following passage is here omitted in the translation: — “Non enim de coitu loquitur Moses, sed de aliquo liberiore gestu, qui vel dissolute lasciviae, vel conjugalis amoris testis esset.” For Moses does not speak about marital intercourse, but about some too free movement, which was a proof of either dissolute exuberance or conjugal love. But now licentiousness has so broken through all bounds, that husbands are compelled to hear in silence of the dissolute conduct of their wives with strangers.

10. What is this thou hast done unto us? The Lord does not chastise Isaac as he deserved, perhaps because he was not so fully endued with patience as his father was; and, therefore, lest the seizing of his wife should dishearten him, God mercifully prevents it. Yet, that the censure may produce the deeper shame, God constitutes a heathen his master and his reprover. We may add, that Abimelech chides his folly, not so much with the design of injuring him, as of upbraiding him. It ought, however, deeply to have wounded the mind of the holy man, when he perceived that his offense was obnoxious to the judgment even of the blind. Wherefore, let us remember that we must walk in the light which God has kindled for us, lest even unbelievers, who are wrapped in the darkness of ignorance, should reprove our stupor. And certainly when we neglect to obey the voice of God, we deserve to be sent to oxen and asses for instruction.³⁸³⁸     The allusion is obviously to Isaiah 1:3: “The ox knoweth his owner, and the ass his master’s crib; but Israel doth not know, my people doth not consider.” — Ed. Abimelech, truly, does not investigate nor prosecute the whole offense of Isaac, but only alludes to one part of it. Yet Isaac, when thus gently admonished by a single word, ought to have condemned himself, seeing that, instead of committing himself and his wife to God, who had promised to be the guardian of them both, he had resorted, through his own unbelief, to an illicit remedy. For faith has this property, that it confines us within divinely prescribed bounds, so that we attempt nothing except with God’s authority or permission. Whence it follows that Isaac’s faith wavered when he swerved from his duty as a husband. We gather, besides, from the words of Abimelech, that all nations have the sentiment impressed upon their minds, that the violation of holy wedlock is a crime worthy of divine vengeance, and have consequently a dread of the judgment of God. For although the minds of men are darkened with dense clouds, so that they are frequently deceived; yet God has caused some power of discrimination between right and wrong to remain, so that each should bear about with him his own condemnation, and that all should be without excuse. If, then, God cites even unbelievers to his tribunal, and does not suffer them to escape just condemnation, how horrible is that punishment which awaits us, if we endeavor to obliterate, by our own wickedness, that knowledge which God has engraven on our consciences?

11. And Abimelech charged all his people. In denouncing capital punishment against any who should do injury to this stranger, we may suppose him to have issued this edict as a special privilege; for it isnot customary thus rigidly to avenge every kind of injury. Whence, then, arose this disposition on the part of the king to prefer Isaac to all the native inhabitants of the country, and almost to treat him as an equal, except that some portion of the divine majesty shone forth in him, which secured to him this degree of reverence? God, also, to assist the infirmity of his servant, inclined the mind of the heathen king, in every way, to show him favor. And there is no doubt that his general modesty induced the king thus carefully to protect him; for he, perceiving him to be a timid man, who had been on the point of purchasing his own life by the ruin of his wife, was the more disposed to assist him in his dangers, in order that he might live in security under his own government.