CHAPTER 4
Lecture 9
28 Now we, brethren, as Isaac was, are the children of promise.
29 But as then he that was born according to the flesh persecuted him that was after the spirit; so also it is now.
30 But what saith the scripture? Cast out the bondwoman and her son; for the son of the bondwoman shall not be heir with the son of the free woman.
31 So then, brethren, we are not the children of the bondwoman but of the free; by the freedom wherewith Christ has made us free.
Having disclosed the mystery as to the mothers, he now discloses it as to the sons.
First, he differentiates between the sons;
Secondly, he sets down the main conclusion (v. 31).
He distinguishes the sons on three counts:
First, as to the manner of origin;
Secondly, as to the feeling of love (v. 29).
Thirdly, as to their right to the inheritance (v. 30).
The manner of origin, according to which the sons of Abraham are born, is twofold: one is by origin according to the flesh, as Ishmael, of the bondwoman; the other not according to the flesh, as Isaac, of the free woman-not because he was not born in the way of nature, but because, as has been said, it was beyond the natural power of the flesh for a son to be born of a barren old woman. Two people are understood by these two sons: by Ishmael is understood the Jewish people, who derived from Abraham by carnal propagation; but by Isaac, the people of the Gentiles, who descended from Abraham by imitation of his faith. Hence he says: Now we, brethren , i.e., the faithful, both Jew and Gentile, as Isaac was, i.e., in the line of Isaac, are the children of the promise that was made to Abraham: “They that are the children of the promise are accounted for the seed” (Gen 21; Rom 9:8). But note that the children of Abraham according to the flesh are, literally, the Jewish people; but, mystically, the ones who come to the faith for the sake of carnal and temporal goods.
Secondly, they are distinguished according to affection, because he that was born according to the flesh persecuted him that was after the spirit. But this raises a difficulty. First, because it is not recorded that Ishmael persecuted Isaac, but only that they played together: “When Sara had seen the son of Hagar, the Egyptian, playing with Isaac her son, she said to Abraham: Cast out this bondwoman and her son” (Gen 21:9). I answer that the Apostle calls this playing a persecution, because there is deception when an older person plays with a younger one; since the older person, in playing with the younger, intends to deceive him. Or, as some say, Ishmael compelled Isaac to adore the clay images he fashioned. By this he was teaching him to be turned from the worship of the one God; and this was a considerable persecution, since it is a greater evil to cause spiritual death than bodily. Furthermore, in Genesis this is called a game because he did this under the guise of a game.
There is another difficulty, namely, how the children according to the flesh persecuted and do persecute the children according to the spirit? The answer is that from the beginning of the early Church the Jews persecuted Christians, as is obvious in the Acts of the Apostles, and they would do the same even now, if they were able. Now, however, those who are carnal persecute spiritual men in the Church even as to the body; those, namely, who seek glory and temporal gain in the Church. Hence a Gloss says that “all who seek from the Lord earthly aggrandizement in the Church pertain to this Ishmael. They are the ones who oppose those who are making spiritual progress and slander them. They have iniquity in their mouth, and craft and deceit on their tongues.” But the ones who spiritually persecute the spiritual sons are the haughty and the hypocrites. For sometimes they who are plainly carnal and evil recognize their guilt and humble themselves before the good; but the foolish persecute in others the goodness they themselves lack.
A further question arises from the fact that heretics whom we persecute say that they are the ones born according to the spirit and we according to the flesh. I answer that there are two kinds of persecution: the good one is that in which a person persecutes another to lead him back to good. And this is what just men do to evil men, and spiritual men to carnal men; either to correct them, if they want to be converted, or, if they are obstinate, to destroy them, lest they contaminate the flock of the Lord. The other type of persecution is evil, namely, when a person persecutes another in order to pervert him; and this is what those who are born according to the flesh do to those who are born according to the spirit.
Finally, as to their right to the inheritance, they are distinguished by the authority of Scripture: Cast out the bondwoman and her son (Gen 21:10). By this we are given to understand that the Jews and persecutors of the Christian religion, as well as carnal and evil Christians, will be cast out from the kingdom of heaven: “Many shall come from the east and the west and shall sit down with Abraham and Isaac and Jacob in the kingdom of heaven” (Mt 8:11); “Without are dogs and sorcerers” (Rev 22:15). Furthermore, the bondwoman, i.e., vice and sin itself, will be cast out: “Every work that is corruptible shall fail in the end” (Sir 14:20). The reason for all this is added, because the son of the bondwoman shall not be heir with the son of the free woman. For in this world the good are mingled with the wicked and the wicked with the good: “As the lily among thorns, so is my love among the daughters” (Cant 2:2). But in the eternal fatherland there will be only the good. In Judges (11:2) it is said to Jephtah: “Thou canst not inherit in the house of our father, because thou art born of a harlot.” This freedom we obtain from Christ; hence he says, by the freedom wherewith Christ has made us free: “If therefore the son shall make you free, you shall be free indeed” (Jn 8:36).