breeding of cattle (Sefer nashim, Hilkot issure biah ve-kaleë behemah). The law concerning circumcision belongs also to this class. The general purpose of these precepts has already been described by us. We will now proceed to explain them singly.
It is well known that man requires friends all his lifetime. Aristotle explains this in the ninth book of his Nikomachean Ethics. When man is in good health and prosperous, he enjoys the company of his friends; in time of trouble he is in need of them; in old age, when his body is weak, he is assisted by them. This love is more frequent and more intense between parents and children, and among [other] relations. Perfect love, brotherhood, and mutual assistance is only found among those near to each other by relationship. The members of a family united by common descent from the same grandfather, or even from some more distant ancestor, have towards each other a certain feeling of love, help each other, and sympathize with each other. To effect this is one of the chief purposes of the Law. Professional harlots were therefore not tolerated in Israel (Deut. xxiii. 18), because their existence would disturb the above relationship between man and man. Their children are strangers to everybody; no one knows to what family they belong; nor does any person recognize them as relatives. And this is the greatest misfortune that can befall any child or father. Another important object in prohibiting prostitution is to restrain excessive and continual lust; for lust increases with the variety of its objects. The sight of that to which a person has been accustomed for a long time does not produce such an ardent desire for its enjoyment as is produced by objects new in form and character. Another effect of this prohibition is the removal of a cause for strife; for if the prohibition did not exist, several persons might by chance come to one woman, and would naturally quarrel with each other; they would in many cases kill one another, or they would kill the woman. This is known to have occurred in days of old, "And they assembled themselves by troops in a harlot's house" (Jer. v. 7). In order to prevent these great evils, and to effect the great boon that all men should know their relationship to each other, prostitutes (Deut. xxiii. 17) were not tolerated, and sexual intercourse was only permitted when man has chosen a certain female, and married her openly; for if it sufficed merely to choose her, many a person would bring a prostitute into his house at a certain time agreed upon between them, and say that she was his wife. Therefore it is commanded to perform the act of engagement by which he declares that he has chosen her to take her for his wife, and then to go through the public ceremony of marriage. Comp. "And Boaz took ten men," etc. (Ruth iv. 2). It may happen that husband and wife do not agree, live without love and peace, and do not enjoy the benefit of a home; in that case he is permitted to send her away. If he had been allowed to divorce her by a mere word, or by turning her out of his house, the wife would wait for some negligence [on the part of the husband], and then come out and say that she was divorced; or having committed adultery, she and the adulterer would contend that she had then been divorced. Therefore the law is that divorce can only take place by means of a document which can serve as evidence, "He shall write her a bill of divorcement" (Deut. xxiv. 1). There are frequently occasions for suspicion of adultery and doubts concerning the conduct of the wife. Laws concerning
