Matthew 10:34

Mystically; A sword is the sharpest of all weapons, and thence it is the emblem of the right of authority, the impartiality of justice, the correction of offenders. The word of God, we may remember, is likened to a sword; (Eph. 6:17. Heb. 4:12.) so here the sword that is sent upon the earth is His preaching poured into the heart of man.

Again, He sets forth the things that are more painful, and that with great aggravation: and the objection they were sure to meet Him with, He prevents them by stating. I mean, lest hearing this, they should say, "For, this then art Thou come, to destroy both us, and them that obey us, and to fill the earth with war?" He first saith Himself, "I am not come to send peace on earth." How then did He enjoin them to pronounce peace on entering into each house? And again, how did the angels say, "Glory to God in the highest, and on earth peace"? And how came all the prophets too to publish it for good tidings? Because this more than anything is peace, when the diseased is cut off, when the mutinous is removed. For thus it is possible for Heaven to be united to earth. Since the physician too in this way preserves the rest of the body, when he amputates the incurable part; and the general, when he has brought to a separation them that were agreed in mischief. Thus it came to pass also in the case of that famous tower; for their evil peace was ended by their good discord, and peace made thereby. Thus Paul also divided them that were conspiring against him. And in Naboth's case that agreement was at the same time more grievous than any war. For concord is not in every case a good thing, since even robbers agree together. The war is not then the effect of His purpose, but of their temper. For His will indeed was that all should agree in the word of godliness; but because they fell to dissension, war arises. Yet He spake not so; but what saith He? "I am not come to send peace;" comforting them. As if He said, For think not that ye are to blame for these things; it is I who order them so, because men are so disposed. Be not ye therefore confounded, as though the events happened against expectation. To this end am I come, to send war among men; for this is my will. Be not ye therefore troubled, when the earth is at war, as though it were subject to some hostile device. For when the worse part is rent away, then after that Heaven is knit unto the better. And these things He saith, as strengthening them against the evil suspicion of the multitude. And He said not "war," but what was more grievous than it, "a sword." And if there be somewhat painful in these expressions, and of an alarming emphasis, marvel not. For, it being His will to train their ears by the severity of His words, lest in their difficult circumstances they should start aside, He fashioned His discourse accordingly; lest any one should say it was by flattery He persuaded them, and by concealing the hardships; therefore even to those things which merited to be otherwise expressed, He gave by His words the more galling and painful turn. For it is better to see persons' gentleness in things, than in words.

He had before said, What I say to you in darkness, that speak ye in the light; He now tells them what will follow upon that preaching, saying, Think not that I am come to send peace upon earth; I am not come to send peace, but a sword. For in the matter of belief in Christ, the whole world was divided against itself; each house had its believers and its unbelievers; and therefore was this holy war sent, that an unholy peace might be broken through.

(Quæst. in Matt. q. 3.) Otherwise; I am come to set a man against his father; for he renounces the Devil, who was his son; the daughter against her mother, that is, the people of God against the city of the world, that is, the wicked society of mankind, which is spoken of in Scripture under the names of Babylon, Egypt, Sodom, and other names. The daughter-in-law against her mother-in-law, that is, the Church against the Synagogue, which according to the flesh, brought forth Christ the spouse of the Church. They are severed by the sword of the Spirit, which is the word of God. And a man's foes are they of his household, those, that is, with whom he before lived as intimates.

Or, He confesses Jesus who by that faith that worketh by love, obediently fulfils His commands; he denies Him who is disobedient. For no other mutual rights can be preserved between those who are at war in their creeds.