These laws relate to the seventh commandment, and, no doubt, are obligatory on us under the gospel, for they are consonant to the very light and law of nature: one of the articles, that of a man's having his father's wife, the apostle speaks of as a sin not so much as named among the Gentiles, Co1 5:1. Though some of the incests here forbidden were practised by some particular persons among the heathen, yet they were disallowed and detested, unless among those nations who had become barbarous, and were quite given up to vile affections. Observe,

I.That which is forbidden as to the relations here specified is approaching to them to uncover their nakedness, Lev 18:6.

1.It is chiefly intended to forbid the marrying of any of these relations. Marriage is a divine institution; this and the sabbath, the eldest of all, of equal standing with man upon the earth: it is intended for the comfort of human life, and the decent and honourable propagation of the human race, such as became the dignity of man's nature above that of the beasts. It is honourable in all, and these laws are for the support of the honour of it. It was requisite that a divine ordinance should be subject to divine rules and restraints, especially because it concerns a thing wherein the corrupt nature of man is as apt as in any thing to be wilful and impetuous in its desires, and impatient of check. Yet these prohibitions, besides their being enacted by an incontestable authority, are in themselves highly reasonable and equitable. (1.) By marriage two were to become one flesh, therefore those that before were in a sense one flesh by nature could not, without the greatest absurdity, become one flesh by institution; for the institution was designed to unite those who before were not united. (2.) Marriage puts an equality between husband and wife. "Is she not thy companion taken out of thy side?" Therefore, if those who before were superior and inferior should intermarry (which is the case in most of the instances here laid down), the order of nature would be taken away by a positive institution, which must by no means be allowed. The inequality between master and servant, noble and ignoble, is founded in consent and custom, and there is no harm done if that be taken away by the equality of marriage; but the inequality between parents and children, uncles and nieces, aunts and nephews, either by blood or marriage, is founded in nature, and is therefore perpetual, and cannot without confusion be taken away by the equality of marriage, the institution of which, though ancient, is subsequent to the order of nature. (3.) No relations that are equals are forbidden, except brothers and sisters, by the whole blood or half blood, or by marriage; and in this there is not the same natural absurdity as in the former, for Adam's sons must of necessity have married their own sisters; but it was requisite that it should be made by a positive law unlawful and detestable, for the preventing of sinful familiarities between those that in the days of their youth are supposed to live in a house together, and yet cannot intermarry without defeating one of the intentions of marriage, which is the enlargement of friendship and interest. If every man married his own sister (as they would be apt to do from generation to generation if it were lawful), each family would be a world to itself, and it would be forgotten that we are members one of another. It is certain that this has always been looked upon by the more sober heathen as a most infamous and abominable thing; and those who had not this law yet were herein a law to themselves. The making use of the ordinance of marriage for the patronizing of incestuous mixtures is so far from justifying them, or extenuating their guilt, that it adds the guilt of profaning an ordinance of God, and prostituting that to the vilest of purposes which was instituted for the noblest ends. But,

2.Uncleanness, committed with any of these relations out of marriage, is likewise, without doubt, forbidden here, and no less intended than the former: as also all lascivious carriage, wanton dalliance, and every thing that has the appearance of this evil. Relations must love one another, and are to have free and familiar converse with each other, but it must be with all purity; and the less it is suspected of evil by others the more care ought the persons themselves to take that Satan do not get advantage against them, for he is a very subtle enemy, and seeks all occasions against us.

II.The relations forbidden are most of them plainly described; and it is generally laid down as a rule that what relations of a man's own he is bound up from marrying the same relations of his wife he is likewise forbidden to marry, for they two are one. That law which forbids marrying a brother's wife (Lev 18:16) had an exception peculiar to the Jewish state, that, if a man died without issue, his brother or next of kin should marry the widow, and raise up seed to the deceased (Deu 25:5), for reasons which held good only in that commonwealth; and therefore now that those reasons have ceased the exception ceases, and the law is in force, that a man must in no case marry his brother's widow. That article (Lev 18:18) which forbids a man to take a wife to her sister supposes a connivance at polygamy, as some other laws then did (Exo 21:10; Deu 21:15), but forbids a man's marrying two sisters, as Jacob did, because between those who had before been equal there would be apt to arise greater jealousies and animosities than between wives that were not so nearly related. If the sister of the wife be taken for the concubine, or secondary wife, nothing can be more vexing in her life, or as long as she lives.

Any that is near of kin - כל שאר בשרו col shear besaro, any remnant of his flesh, i.e., to any particularly allied to his own family, the prohibited degrees in which are specified from the 7th to the 17th verse (Lev 18:7-17) inclusive. Notwithstanding the prohibitions here, it must be evident that in the infancy of the world, persons very near of kin must have been joined in matrimonial alliances; and that even brothers must have matched with their own sisters. This must have been the case in the family of Adam. In these first instances necessity required this; when this necessity no longer existed, the thing became inexpedient and improper for two reasons:

1.That the duties owing by nature to relatives might not be confounded with those of a social or political kind; for could a man be a brother and a husband, a son and a husband, at the same time, and fulfill the duties of both? Impossible.

2.That by intermarrying with other families, the bonds of social compact might be strengthened and extended, so that the love of our neighbor, etc., might at once be felt to be not only a maxim of sound policy, but also a very practicable and easy duty; and thus feuds, divisions, and wars be prevented.

None of you shall approach to any that is near of kin to him,.... Or to all "the rest of his flesh" (t), which together with his make one flesh, who are of the same flesh and blood with him, and are united together in the bonds of consanguinity; and such, with respect to a man, are his mother, sister, and daughter; his mother, of whom he was born, his sister, who lay in and sprung from the same "venter" he did, and his daughter, who is his own flesh; and with respect to a woman, her father brother, and son, who are in the same degree of relation, and both sexes are included in this prohibition; for though in the original text it is "a man, a man" (u), yet as it takes in every man, so every woman: hence, as Jarchi observes, it is expressed in the plural number, "do not ye approach", to caution both male and female; and it is also understood by the Talmudists (w) of Gentiles as well as Israelites, for they ask, what is the meaning of the phrase "a man, a man?" the design of it is, they say, to comprehend the Gentiles, who are equally cautioned against incests as the Israelites; and indeed the inhabitants of the land of Canaan are said to defile the land with the incests and other abominations hereafter mentioned, and for which they were driven out of it: now when man and woman are forbidden to "approach" to those of the same flesh and blood with them, the sense is not that they may not come into each other's company, or make use of any civil or friendly salutations, or have a free and familiar conversation with each other, provided that modesty and chastity be preserved; but they are not so to draw near as to lie with, or have carnal knowledge of one another, in which sense the phrase is used, Gen 20:4; or to tempt to it or solicit it, and as it follows, which explains the meaning of it:

to uncover their nakedness; that is, those parts, which, by a contrary way of speaking, are so called, which should never be naked or exposed to view; but should be always covered, as nature teaches to do, and as our first parents did, when they perceived themselves naked, and were ashamed, Gen 3:7, this phrase signifies the same as to lie with another, or have carnal knowledge of them, wherefore the following laws are generally understood of incestuous marriages; for if such an action is not to be done between persons standing in such a relation, as here in general, and afterwards more particularly described, then there ought to be no intermarriages between them; and if such marriages are forbidden, and such actions unlawful in a married state, then much more in an unmarried one; wherefore the several following instances are so many breaches of the seventh command, Exo 20:14, and so many explications and illustrations of it, and consequently of a moral nature, and binding upon all men, Jews and Gentiles:

I am the Lord; that gave this caution, and enjoined this prohibition, and would greatly resent and severely revenge the neglect of it: the particulars follow.

(t) "ad omnes reliquias carnis suae", Montanus; "ad quascunque reliquias carnis suae", Tigurine version. (u) "vir, vir", Montanus, Vatablus, Drusius. (w) T. Bab. Sanhedrim, fol. 57. 2. T. Hieros. Kiddushin, fol. 58. 2, 3.

None of you shall approach to any that is near of kin to him--Very great laxity prevailed amongst the Egyptians in their sentiments and practice about the conjugal relation, as they not only openly sanctioned marriages between brothers and sisters, but even between parents and children. Such incestuous alliances Moses wisely prohibited, and his laws form the basis upon which the marriage regulations of this and other Christian nations are chiefly founded. This verse contains a general summary of all the particular prohibitions; and the forbidden intercourse is pointed out by the phrase, "to approach to." In the specified prohibitions that follow, all of which are included in this general summary, the prohibited familiarity is indicated by the phrases, to "uncover the nakedness" [Lev 18:12-17], to "take" [Lev 18:17-18], and to "lie with" [Lev 18:22-23]. The phrase in this sixth verse, therefore, has the same identical meaning with each of the other three, and the marriages in reference to which it is used are those of consanguinity or too close affinity, amounting to incestuous connections.