(17) Thou shalt not covet.--This command seems to have been added in order to teach the general principle that the Law of God is concerned, not with acts and words only, but with the thoughts of the heart. Rightly understood, the seventh and eighth commandments contain the tenth, which strikes at covetousness and lustful desire. (Comp. Matthew 5:27-28.) But ancient moralists did not usually recognise this; thought, unless carried out into acts, was regarded as "free;" no responsibility was considered to attach to it, and consequently no one felt it needful to control his thoughts or regulate them. It was therefore of importance that the Divine Law should distinctly assert a control over men's thoughts and feelings, since they are the source of all that is evil in word and act; and true godliness consists in bringing "every thought into captivity to Christ" (2Corinthians 10:5).

Verse 17. - Thou shalt not covet. Here the Mosaic law takes a step enormously in advance of any other ancient code. Most codes stopped short at the deed; a few went on to words; not one attempted to control thoughts. "Thou shalt not covet" teaches men that there is One who sees the heart; to whose eyes "all things are naked and open;" and who cares far less for the outward act than the inward thought or motive from which the act proceeds. "Thou shalt not covet: lays it down again that we are not mere slaves of our natural desires and passions, but have a controlling power implanted within us, by means of which we can keep down passion, check desire, resist impulse. Man is lord of himself, capable, by the exercise of his free-will, of moulding his feelings, weakening or intensifying his passions, shaping his character. God, who "requires truth in the inward parts," looks that we should in all cases go to the root of the matter, and not be content with restraining ourselves from evil acts and evil words, but eradicate the evil feeling from which the acts and words proceed. Thy neighbours house, etc. The "house" is mentioned first as being of primary necessity, and as in some sort containing all the rest. A man does not take a wife until he has a home to bring her to, or engage domestic servants, or buy slaves, except to form part of a household. The other objects mentioned are placed in the order in which they are usually valued. The multiplication of objects is by way of emphasis.

CHAPTER 20:18-21

20:12-17 The laws of the SECOND table, that is, the last six of the ten commandments, state our duty to ourselves and to one another, and explain the great commandment, Thou shalt love thy neighbour as thyself, Lu 10:27. Godliness and honesty must go together. The fifth commandment concerns the duties we owe to our relations. Honour thy father and thy mother, includes esteem of them, shown in our conduct; obedience to their lawful commands; come when they call you, go where they send you, do what they bid you, refrain from what they forbid you; and this, as children, cheerfully, and from a principle of love. Also submission to their counsels and corrections. Endeavouring, in every thing, to comfort parents, and to make their old age easy; maintaining them if they need support, which our Saviour makes to be particularly intended in this commandment, Mt 15:4-6. Careful observers have noted a peculiar blessing in temporal things on obedient, and the reverse on disobedient children. The sixth commandment requires that we regard the life and the safety of others as we do our own. Magistrates and their officers, and witnesses testifying the truth, do not break this command. Self-defence is lawful; but much which is not deemed murder by the laws of man, is such before God. Furious passions, stirred up by anger or by drunkenness, are no excuse: more guilty is murder in duels, which is a horrible effect of a haughty, revengeful spirit. All fighting, whether for wages, for renown, or out of anger and malice, breaks this command, and the bloodshed therein is murder. To tempt men to vice and crimes which shorten life, may be included. Misconduct, such as may break the heart, or shorten the lives of parents, wives, or other relatives, is a breach of this command. This command forbids all envy, malice, hatred, or anger, all provoking or insulting language. The destruction of our own lives is here forbidden. This commandment requires a spirit of kindness, longsuffering, and forgiveness. The seventh commandment concerns chastity. We should be as much afraid of that which defiles the body, as of that which destroys it. Whatever tends to pollute the imagination, or to raise the passions, falls under this law, as impure pictures, books, conversation, or any other like matters. The eighth commandment is the law of love as it respects the property of others. The portion of worldly things allotted us, as far as it is obtained in an honest way, is the bread which God hath given us; for that we ought to be thankful, to be contented with it, and, in the use of lawful means, to trust Providence for the future. Imposing upon the ignorance, easiness, or necessity of others, and many other things, break God's law, though scarcely blamed in society. Plunderers of kingdoms though above human justice, will be included in this sentence. Defrauding the public, contracting debts without prospect of paying them, or evading payment of just debts, extravagance, all living upon charity when not needful, all squeezing the poor in their wages; these, and such things, break this command; which requires industry, frugality, and content, and to do to others, about worldly property, as we would they should do to us. The ninth commandment concerns our own and our neighbour's good name. This forbids speaking falsely on any matter, lying, equivocating, and any way devising or designing to deceive our neighbour. Speaking unjustly against our neighbour, to hurt his reputation. Bearing false witness against him, or in common conversation slandering, backbiting, and tale-bearing; making what is done amiss, worse than it is, and in any way endeavouring to raise our reputation upon the ruin of our neighbour's. How much this command is every day broken among persons of all ranks! The tenth commandment strikes at the root; Thou shalt not covet. The others forbid all desire of doing what will be an injury to our neighbour; this forbids all wrong desire of having what will gratify ourselves.Thou shall not covet thy neighbour's house,.... This is the tenth and last commandment, and is an explanation of several of the past; showing that the law of God not only forbids external acts of sin, but the inward and first motions of the mind to it, which are not known, and would not be thought to be sinful, were it not for this law; nor are they known by this law until the Spirit of God by it convinces men of them, in whose light they see them to be sinful; even not only the schemes and contrivances of sin in the mind, the imaginations of it, thoughts dwelling upon it with pleasure, but even the first risings of sin in the heart; and such motions of it which are not assented unto, and unawares spring up from the corruption of nature, and are sudden craving desires after unlawful things, even these are forbidden by this law; which shows the spirituality of the law of God, and the impossibility of its being perfectly kept by fallen men. The apostle has reference to it, Romans 7:7. Several particulars are here mentioned not to be coveted, as instances and examples instead of others. Thus, for instance, "a neighbour's house" is not to be coveted; "nor his field", as the Septuagint version here adds, agreeably to Deuteronomy 5:21, a man is not secretly to wish and desire that such a man's house or land were his, since this arises from a discontent of mind with respect to his own habitation and possessions; and a man should be content with such things as he has, and not covet another's, which is not without sin:

thou shalt not covet thy neighbour's wife: and wish she was thine, and lust after her; this is a breach of the seventh command, and serves to explain and illustrate that. This clause stands first in the Septuagint version, as it does in Deuteronomy 5:21,

nor his manservant, nor maidservant, nor his ox, nor his ass, nor any thing that is thy neighbours'; which, with the first clause, serve to explain the eighth command, showing that we are not only forbid to take away what is another man's property, any of the goods here mentioned, or any other, but we are not secretly to desire them, and wish they were in our possession; since it discovers uneasiness and dissatisfaction with our own lot and portion, and is coveting another man's property, which is coveting an evil covetousness.