Sarah, in fact, was barren; and, despairing of offspring, and being resolved that she would have at least through her handmaid that blessing she saw she could not in her own person procure, she gave her handmaid to her husband, to whom she herself had been unable to bear children. From him she required this conjugal duty, exercising her own right in another's womb. And thus Ishmael was born according to the common law of human generation, by sexual intercourse. Therefore it is said that he was born "according to the flesh,"—not because such births are not the gifts of God, nor His handiwork, whose creative wisdom "reaches," as it is written, "from one end to another mightily, and sweetly doth she order all things,"[136] but because, in a case in which the gift of God, which was not due to men and was the gratuitous largess of grace, was to be conspicuous, it was requisite that a son be given in a way which no effort of nature could compass. Nature denies children to persons of the age which Abraham and Sarah had now reached; besides that, in Sarah's case, she was barren even in her prime. This nature, so constituted that offspring could not be looked for, symbolized the nature of the human race vitiated by sin and by just consequence condemned, which deserves no future felicity. Fitly, therefore, does Isaac, the child of promise, typify the children of grace, the citizens of the free city, who dwell together in everlasting peace, in which self-love and self-will have no place, but a ministering love that rejoices in the common joy of all, of many hearts makes one, that is to say, secures a perfect concord.
4. Of the conflict and peace of the earthly city.
But the earthly city, which shall not be everlasting (for it will no longer be a city when it has been committed to the extreme penalty), has its good in this world, and rejoices in it with such joy as such things can afford. But as this is not a good which can discharge its devotees of all distresses, this city is often divided against itself by litigations, wars, quarrels, and such victories as are either life-destroying or short-lived. For each part of it that arms against another part of it seeks to triumph over the nations through itself in bondage to vice. If, when it has conquered, it is inflated with pride, its victory is life-destroying; but if it turns its thoughts upon the common casualties of our mortal condition, and is rather anxious concerning the disasters that may befall it than elated with the successes already achieved, this victory, though of a higher kind, is still only short-lived; for it cannot abidingly rule over those whom it has victoriously subjugated. But the things which this city desires cannot justly be said to be evil, for it is itself, in its own kind, better than all other human good. For it desires earthly peace for the sake of enjoying earthly goods, and it makes war in order to attain to this peace; since, if it has conquered, and there remains no one to resist it, it enjoys a peace which it had not while there were opposing parties who contested for the enjoyment of those things which were too small to satisfy both. This peace is purchased by toilsome wars; it is obtained by what they style a glorious victory. Now, when victory remains with the party which had the juster cause, who hesitates to congratulate the victor, and style it a desirable peace? These things, then, are good things, and without doubt the gifts of God. But if they neglect the better things of the heavenly city, which are secured by eternal victory and peace never-ending, and so inordinately covet these present good things that they believe them to be the only desirable things, or love them better than those things which are believed to be better,—if this be so, then it is necessary that misery follow and ever increase.
5. Of the fratricidal act of the founder of the earthly city, and the corresponding crime of the founder of Rome.
Thus the founder of the earthly city was a fratricide. Overcome with envy, he slew his own brother, a citizen of the eternal city, and a sojourner on earth. So that we cannot be surprised that this first specimen, or, as the Greeks say, archetype of crime, should, long afterwards, find a corresponding crime at the foundation of that city which was destined to reign over so many nations, and be the head of this earthly city of which we speak. For of that city also, as one of their poets has mentioned, "the first walls were stained with a brother's blood,"[137] or, as Roman history records, Remus was slain by his brother Romulus. And thus there is no difference between the foundation of this city and of the earthly city, unless it be that Romulus and Remus were both citizens of the earthly city. Both desired to have the glory of founding the Roman republic, but both could not have as much glory as if one only claimed it; for he who wished to have the glory of ruling would certainly rule less if his power were shared by a living consort. In order, therefore, that the whole glory might be enjoyed by one, his consort was removed; and by this crime the empire was made larger indeed, but inferior, while otherwise it would have been less, but better. Now these brothers, Cain and Abel, were not both animated by the same earthly desires, nor did the murderer envy the other because he feared that, by both ruling, his own dominion would be curtailed,—for Abel was not solicitous to rule in that city which his brother built,—he was moved by that diabolical, envious hatred with which the evil regard the good, for no other reason than because they are good while themselves are evil. For the possession of goodness is by no means diminished by being shared with a partner either permanent or temporarily assumed; on the contrary, the possession of goodness is increased in proportion to the concord and charity of each of those who share it. In short, he who is unwilling to share this possession cannot have it; and he who is most willing to admit others to a share of it will have the greatest abundance to himself. The quarrel, then, between Romulus and Remus shows how the earthly city is divided against itself; that which fell out between Cain and Abel illustrated the hatred that subsists between the two cities, that of God and that of men. The wicked war with the wicked; the good also war with the wicked. But with the good, good men, or at least perfectly good men, cannot war; though, while only going on towards perfection, they war to this extent, that every good man resists others in those points in which he resists himself. And in each individual "the flesh lusteth against the spirit, and the spirit against the flesh."[138] This spiritual lusting, therefore, can be at war with the carnal lust of another man; or carnal lust may be at war with the spiritual desires of another, in some such way as good and wicked men are at war; or, still more certainly, the carnal lusts of two men, good but not yet perfect, contend together, just as the wicked contend with the wicked, until the health of those who are under the treatment of grace attains final victory.
6. Of the weaknesses which even the citizens of the city of God suffer during this earthly pilgrimage in punishment of sin, and of which they are healed by God's care.
This sickliness—that is to say, that disobedience of which we spoke in the fourteenth book—is the punishment of the first disobedience. It is therefore not nature, but vice; and therefore it is said to the good who are growing in grace, and living in this pilgrimage by faith, "Bear ye one another's burdens, and so fulfil the law of Christ."[139] In like manner it is said elsewhere, "Warn them that are unruly, comfort the feeble-minded, support the weak, be patient toward all men. See that none render evil for evil unto any man."[140] And in another place, "If a man be overtaken in a fault, ye which are spiritual restore such an one in the spirit of meekness; considering thyself, lest thou also be tempted."[141] And elsewhere, "Let not the sun go down upon your wrath."[142] And in the Gospel, "If thy brother shall trespass against thee, go and tell him his fault between thee and him alone."[143] So too of sins which may create scandal the apostle says, "Them that sin rebuke before all, that others also may fear."[144] For this purpose, and that we may keep that peace without which no man can see the Lord,[145] many precepts are given which carefully inculcate mutual forgiveness; among which we may number that terrible word in which the servant is ordered to pay his formerly remitted debt of ten thousand talents, because he did not remit to his fellow-servant his debt of two hundred pence. To which parable the Lord Jesus added the words, "So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother."[146] It is thus the citizens of the city of God are healed while still they sojourn in this earth and sigh for the peace of their heavenly country. The Holy Spirit, too, works within, that the medicine externally applied may have some good result. Otherwise, even though God Himself make use of the creatures that are subject to Him, and in some human form address our human senses, whether we receive those impressions in sleep or in some external appearance, still, if He does not by His own inward grace sway and act upon the mind, no preaching of the truth is of any avail. But this God does, distinguishing between the vessels of wrath and the vessels of mercy, by His own very secret but very just providence. When He Himself aids the soul in His own hidden and wonderful ways, and the sin which dwells in our members, and is, as the apostle teaches, rather the punishment of sin, does not reign in our mortal body to obey the lusts of it, and when we no longer yield our members as instruments of unrighteousness,[147] then the soul is converted from its own evil and selfish desires, and, God possessing it, it possesses itself in peace even in this life, and afterwards, with perfected health and endowed with immortality, will reign without sin in peace everlasting.
7. Of the cause of Cain's crime and his obstinacy, which not even the word of God could subdue.
But though God made use of this very mode of address which we have been endeavouring to explain, and spoke to Cain in that form by which He was wont to accommodate Himself to our first parents and converse with them as a companion, what good influence had it on Cain? Did he not fulfil his wicked intention of killing his brother even after he was warned by God's voice? For when God had made a distinction between their sacrifices, neglecting Cain's, regarding Abel's, which was doubtless intimated by some visible sign to that effect; and when God had done so because the works of the one were evil but those of his brother good, Cain was very wroth, and his countenance fell. For thus it is written: "And the Lord said unto Cain, Why art thou wroth, and why is thy countenance fallen? If thou offerest rightly, but dost not rightly distinguish, hast thou not sinned? Fret not thyself, for unto thee shall be his turning, and thou shalt rule over him."[148] In this admonition administered by God to Cain, that clause indeed, "If thou offerest rightly, but dost not rightly distinguish, hast thou not sinned?" is obscure, inasmuch as it is not apparent for what reason or purpose it was spoken, and many meanings have been put upon it, as each one who discusses it attempts to interpret it according to the rule of faith. The truth is, that a sacrifice is "rightly offered" when it is offered to the true God, to whom alone we must sacrifice. And it is "not rightly distinguished" when we do not rightly distinguish the places or seasons or materials of the offering, or the person offering, or the person to whom it is presented, or those to whom it is distributed for food after the oblation. Distinguishing[149] is here used for discriminating,—whether when an offering is made in a place where it ought not or of a material which ought to be offered not there but elsewhere; or when an offering is made at a wrong time, or of a material suitable not then but at some other time; or when that is offered which in no place nor any time ought to be offered; or when a man keeps to himself choicer specimens of the same kind than he offers to God; or when he or any other who may not lawfully partake profanely eats of the oblation. In which of these particulars Cain displeased God, it is difficult to determine. But the Apostle John, speaking of these brothers, says, "Not as Cain, who was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother's righteous."[150] He thus gives us to understand that God did not respect his offering because it was not rightly "distinguished" in this, that he gave to God something of his own but kept himself to himself. For this all do who follow not God's will but their own, who live not with an upright but a crooked heart, and yet offer to God such gifts as they suppose will procure from Him that He aid them not by healing but by gratifying their evil passions. And this is the characteristic of the earthly city, that it worships God or gods who may aid it in reigning victoriously and peacefully on earth not through love of doing good, but through lust of rule. The good use the world that they may enjoy God: the wicked, on the contrary, that they may enjoy the world would fain use God,—those of them, at least, who have attained to the belief that He is and takes an interest in human affairs. For they who have not yet attained even to this belief are still at a much lower level. Cain, then, when he saw that God had respect to his brother's sacrifice, but not to his own, should have humbly chosen his good brother as his example, and not proudly counted him his rival. But he was wroth, and his countenance fell. This angry regret for another person's goodness, even his brother's, was charged upon him by God as a great sin. And He accused him of it in the interrogation, "Why art thou wroth, and why is thy countenance fallen?" For God saw that he envied his brother, and of this He accused him. For to men, from whom the heart of their fellow is hid, it might be doubtful and quite uncertain whether that sadness bewailed his own wickedness by which, as he had learned, he had displeased God, or his brother's goodness, which had pleased God, and won His favourable regard to his sacrifice. But God, in giving the reason why He refused to accept Cain's offering and why Cain should rather have been displeased at himself than at his brother, shows him that though he was unjust in "not rightly distinguishing," that is, not rightly living and being unworthy to have his offering received, he was more unjust by far in hating his just brother without a cause.