It is well known that we must not indulge in any sensual enjoyment whatever with the persons included in the above prohibitions; we must not even look at them if we intend to derive pleasure therefrom. We have explained this in “the laws about forbidden sexual intercourse” (Hilkot issure bïah, xxi. 1–2), and shown that according to the Law we must not even engage our thoughts with the act of cohabitation (ibid. 19) or irritate the organ of generation; and when we find ourselves unintentionally in a state of irritation, we must turn our mind to other thoughts, and reflect on some other thing till we are relieved. Our Sages (B.T. Kidd 30b), in their moral lessons, which give perfection to the virtuous, say as follows: “My son, if that monster meets you, drag it to the house of study. It will melt if it is of iron; it will break in pieces if it is of stone: as is said in Scripture, ‘Is not my word like a fire? saith the Lord, and like a hammer that breaketh the rock in pieces?’ ” (Jer. xxiii. 29). The author of this saying thus exhorts his son to go to the house of study when he finds his organ of generation in an irritated state. By reading, disputing, asking, and listening to questions, the irritation will certainly cease. See how properly the term monster is employed, for that irritation is indeed like a monster. Not only religion teaches this lesson, the philosophers teach the same. I have already quoted verbatim the words of Aristotle. He says: “The sense of touch which is a disgrace to us, leads us to indulge in eating and sensuality,” etc. He calls people degraded who seek carnal pleasures and devote themselves to gastronomy; he denounces in extenso their low and objectionable conduct, and ridicules them. This passage occurs in his Ethics and in his Rhetoric.

In accordance with this excellent principle, which we ought strictly to follow, our Sages teach us that we ought not to look at beasts or birds in the moment of their copulation. According to my opinion, this is the reason why the cross-breeding of cattle is prohibited (Lev. xix. 19). It is a fact that animals of different species do not copulate together, unless by force. It is well known that the low class of breeders of mules are regularly engaged in this work. Our Law objected to it that any Israelite should degrade himself by doing these things, which require so much vulgarity and indecency, and doing that which religion forbids us even to mention, how [[378]]much more to witness or to practise, except when necessary. Cross-breeding, however, is not necessary. I think that the prohibition to bring together two species in any kind of work, as included in the words, “Thou shalt not plow with an ox and an ass together” (Deut. xxii. 10), is only a preventive against the intercourse of two species. For if it were allowed to join such together in any work, we might sometimes also cause their intercourse. That this is the reason of the commandment is proved by the fact that it applies to other animals besides ox and ass; it is prohibited to plow not only with ox and ass together, but with any two kinds. But Scripture mentions as an instance that which is of regular occurrence.

As regards circumcision, I think that one of its objects is to limit sexual intercourse, and to weaken the organ of generation as far as possible, and thus cause man to be moderate. Some people believe that circumcision is to remove a defect in man’s formation; but every one can easily reply: How can products of nature be deficient so as to require external completion, especially as the use of the fore-skin to that organ is evident. This commandment has not been enjoined as a complement to a deficient physical creation, but as a means for perfecting man’s moral shortcomings. The bodily injury caused to that organ is exactly that which is desired; it does not interrupt any vital function, nor does it destroy the power of generation. Circumcision simply counteracts excessive lust; for there is no doubt that circumcision weakens the power of sexual excitement, and sometimes lessens the natural enjoyment; the organ necessarily becomes weak when it loses blood and is deprived of its covering from the beginning. Our Sages (Beresh. Rabba, c. 80) say distinctly: It is hard for a woman, with whom an uncircumcised had sexual intercourse, to separate from him. This is, as I believe, the best reason for the commandment concerning circumcision. And who was the first to perform this commandment? Abraham, our father! of whom it is well known how he feared sin; it is described by our Sages in reference to the words, “Behold, now I know that thou art a fair woman to look upon” (Gen. xii. 11).

There is, however, another important object in this commandment. It gives to all members of the same faith, i.e., to all believers in the Unity of God, a common bodily sign, so that it is impossible for any one that is a stranger, to say that he belongs to them. For sometimes people say so for the purpose of obtaining some advantage, or in order to make some attack upon the Jews. No one, however, should circumcise himself or his son for any other reason but pure faith; for circumcision is not like an incision on the leg, or a burning in the arm, but a very difficult operation. It is also a fact that there is much mutual love and assistance among people that are united by the same sign when they consider it as [the symbol of] a covenant. Circumcision is likewise the [symbol of the] covenant which Abraham made in connexion with the belief in God’s Unity. So also every one that is circumcised enters the covenant of Abraham to believe in the unity of God, in accordance with the words of the Law, “To be a God unto thee, and to thy seed after thee” (Gen. xvii. 7). This purpose of the circumcision is as important as the first, and perhaps more important.

This law can only be kept and perpetuated in its perfection, if circumcision is performed when the child is very young, and this for three good reasons. First, if the operation were postponed till the boy had grown up, [[379]]he would perhaps not submit to it. Secondly, the young child has not much pain, because the skin is tender, and the imagination weak; for grown-up persons are in dread and fear of things which they imagine as coming, some time before these actually occur. Thirdly, when a child is very young, the parents do not think much of him; because the image of the child, that leads the parents to love him, has not yet taken a firm root in their minds. That image becomes stronger by the continual sight; it grows with the development of the child, and later on the image begins again to decrease and to vanish. The parents’ love for a new-born child is not so great as it is when the child is one year old; and when one year old, it is less loved by them than when six years old. The feeling and love of the father for the child would have led him to neglect the law if he were allowed to wait two or three years, whilst shortly after birth the image is very weak in the mind of the parent, especially of the father who is responsible for the execution of this commandment. The circumcision must take place on the eighth day (Lev. xii. 3), because all living beings are after birth, within the first seven days, very weak and exceedingly tender, as if they were still in the womb of their mother; not until the eighth day can they be counted among those that enjoy the light of the world. That this is also the case with beasts may be inferred from the words of Scripture: “Seven days shall it be under the dam” (Lev. xxii. 27), as if it had no vitality before the end of that period. In the same manner man is circumcised after the completion of seven days. The period has been fixed, and has not been left to everybody’s judgment.

The precepts of this class include also the lesson that we must not injure in any way the organs of generation in living beings (ibid. xxii. 24). The lesson is based on the principle of “righteous statutes and judgment” (Deut. iv. 8); we must keep in everything the golden mean; we must not be excessive in love, but must not suppress it entirely; for the Law commands, “Be fruitful, and multiply” (Gen. i. 22). The organ is weakened by circumcision, but not destroyed by the operation. The natural faculty is left in full force, but is guarded against excess. It it prohibited for an Israelite “that is wounded in the stones, or hath his privy member cut off” (Deut. xxiii. 2), to marry an Israelitish woman; because the sexual intercourse is of no use and of no purpose; and that marriage would be a source of ruin to her, and to him who would claim her. This is very clear.

In order to create a horror of illicit marriages, a bastard was not allowed to marry an Israelitish woman (ibid. xxiii. 3); the adulterer and the adulteress were thus taught that by their act they bring upon their seed irreparable injury. In every language and in every nation the issue of licentious conduct has a bad name; the Law therefore raises the name of the Israelites by keeping them free from the admixture of bastards. The priests, who have a higher sanctity, are not allowed to marry a harlot, or a woman that is divorced from her husband, or that is profane (Lev. xii. 7); the high-priest, the noblest of the priests, must not marry even a widow, or a woman that has had sexual intercourse of any kind (ibid. xii. 14). Of all these laws the reason is obvious. If bastards were prohibited to marry any member of the congregation of the Lord, how much more rigidly had slaves and handmaids to be excluded. The reason of the prohibition of intermarriage [[380]]with other nations is stated in the Law: “And thou take of their daughters unto thy sons, and their daughters go a whoring after their gods, and make thy sons go a whoring after their gods” (Exod. xxxiv. 16).

Most of the “statutes” (ḥukkim), the reason of which is unknown to us, serve as a fence against idolatry. That I cannot explain some details of the above laws or show their use is owing to the fact that what we hear from others is not so clear as that which we see with our own eyes. Thus my knowledge of the Sabean doctrines, which I derived from books, is not as complete as the knowledge of those who have witnessed the public practice of those idolatrous customs, especially as they have been out of practice and entirely extinct since two thousand years. If we knew all the particulars of the Sabean worship, and were informed of all the details of those doctrines, we would clearly see the reason and wisdom of every detail in the sacrificial service, in the laws concerning things that are unclean, and in other laws, the object of which I am unable to state. I have no doubt that all these laws served to blot out wrong principles from man’s heart, and to exterminate the practices which are useless, and merely a waste of time in vain and purposeless things. Those principles have turned the mind of the people away from intellectual research and useful actions. Our prophets therefore describe the ways of the idolaters as follows: “(They go) after vain things which cannot profit nor deliver; for they are vain” (1 Sam. xii. 21); “Surely our fathers have inherited lies, vanity and things wherein there is no profit” (Jer. xvi. 19). Consider how great the evil consequences of idolatry are, and say whether we ought with all our power to oppose it or not! Most of the precepts serve, as has been stated by us, as a mere fence against those doctrines [of idolatry], and relieve man from the great and heavy burdens, from the pains and inflictions which formed part of the worship of idols. Every positive or negative precept, the reason of which is unknown to thee, take as a remedy against some of those diseases with which we are unacquainted at present, thank God. This should be the belief of educated men who know the true meaning of the following divine dictum: “I said not unto the seed of Jacob, Seek me in vain” (Isa. xlv. 19).

I have now mentioned all the commandments of these fourteen classes one by one, and pointed out the reason of each of them, with the exception of a few for which I was unable to give the reason, and of some details of less importance; but implicitly we have given the reason even of these, and every intelligent reader will easily find it.

The reasons of the Precepts are now complete.