5:21-26 The Jewish teachers had taught, that nothing except actual murder was forbidden by the sixth commandment. Thus they explained away its spiritual meaning. Christ showed the full meaning of this commandment; according to which we must be judged hereafter, and therefore ought to be ruled now. All rash anger is heart murder. By our brother, here, we are to understand any person, though ever so much below us, for we are all made of one blood. Raca, is a scornful word, and comes from pride: Thou fool, is a spiteful word, and comes from hatred. Malicious slanders and censures are poison that kills secretly and slowly. Christ told them that how light soever they made of these sins, they would certainly be called into judgment for them. We ought carefully to preserve Christian love and peace with all our brethren; and if at any time there is a quarrel, we should confess our fault, humble ourselves to our brother, making or offering satisfaction for wrong done in word or deed: and we should do this quickly; because, till this is done, we are unfit for communion with God in holy ordinances. And when we are preparing for any religious exercises, it is good for us to make that an occasion of serious reflection and self-examination. What is here said is very applicable to our being reconciled to God through Christ. While we are alive, we are in the way to his judgement-seat; after death, it will be too late. When we consider the importance of the case, and the uncertainty of life, how needful it is to seek peace with God, without delay!

21. Ye have heard that it was said by them of old time—or, as in the Margin, "to them of old time." Which of these translations is the right one has been much controverted. Either of them is grammatically defensible, though the latter—"to the ancients"—is more consistent with New Testament usage (see the Greek of Ro 9:12, 26; Re 6:11; 9:4); and most critics decide in favor of it. But it is not a question of Greek only. Nearly all who would translate "to the ancients" take the speaker of the words quoted to be Moses in the law; "the ancients" to be the people to whom Moses gave the law; and the intention of our Lord here to be to contrast His own teaching, more or less, with that of Moses; either as opposed to it—as some go the length of affirming—or at least as modifying, enlarging, elevating it. But who can reasonably imagine such a thing, just after the most solemn and emphatic proclamation of the perpetuity of the law, and the honor and glory in which it was to be held under the new economy? To us it seems as plain as possible that our Lord's one object is to contrast the traditional perversions of the law with the true sense of it as expounded by Himself. A few of those who assent to this still think that "to the ancients" is the only legitimate translation of the words; understanding that our Lord is reporting what had been said to the ancients, not by Moses, but by the perverters of his law. We do not object to this; but we incline to think (with Beza, and after him with Fritzsche, Olshausen, Stier, and Bloomfield) that "by the ancients" must have been what our Lord meant here, referring to the corrupt teachers rather than the perverted people.

Thou shall not kill:—that is, This being all that the law requires, whosoever has imbrued his hands in his brother's blood, but he only, is guilty of a breach of this commandment.

and whosoever shall kill shall be in danger of the judgment—liable to the judgment; that is, of the sentence of those inferior courts of judicature which were established in all the principal towns, in compliance with De 16:16. Thus was this commandment reduced, from a holy law of the heart-searching God, to a mere criminal statute, taking cognizance only of outward actions, such as that which we read in Ex 21:12; Le 24:17.