Wisdom on The Incarnation. He came as a child but one that carried a sword.

For while all things were in quiet silence, and the night was in the midst of her course, [15] Thy almighty word leapt down from heaven from thy royal throne, as a fierce conqueror into the midst of the land of destruction. [16] With a sharp sword carrying thy unfeigned commandment, and he stood and filled all things with death, and standing on the earth reached even to heaven.

As Christmas approaches there is more and more talk by Francis about peace on earth - even amongst believers and unbelievers - but Jesus came with a sword and there can not ever be a materialistic and political peace unless His Church abandons the Great Commission - which the modern church appears to desire.

Matthew 10:

34. Do not think that I came to send peace upon earth: I came not to send peace, but the sword.

35. For I came to set a man at variance against his father, and the daughter against her mother, and the daughter in law against her mother in law. 

36. And a man's enemies shall be they of his own household. 

37. He that loveth father or mother more than me, is not worthy of me; and he that loveth son or daughter more than me, is not worthy of me.

38. And he that taketh not up his cross, and followeth me, is not worthy of me. 

39. He that findeth his life, shall lose it: and he that shall lose his life for me, shall find it. 

40. He that receiveth you, receiveth me: and he that receiveth me, receiveth him that sent me.

Cornelius a Lapide:

Think not that I am come, &c., that is to say, earthly peace: for Christ promised by Isaiah (ix. 6 and 7, and lxv. 25), that He would bring spiritual peace of mind, the peace of the union of the faithful among themselves, and with God and His Angels, which leads to peace and everlasting felicity in Heaven. 

But a sword: i.e., separation, as S. Luke has (xii. 51), discord in faith and religion. He means that He will separate His faithful people by reason of their faith from unbelievers. But the unbelievers will on their part take occasion to separate themselves from the faithful, and will hate them, and will deprive them of liberty and goods and life. This is what Christ especially refers to in what follows; and this too entirely answers to the words of Micah (vii. 6) from which Christ here quotes. 

I am come to separate, &c. A man’s foes shall be they of his own household. Syriac. A man shall have as his enemies the sons of his own house. Because, as S. Chrys. says (Hom. 2, cont. Judæos), it shall come to pass that in the same house there shall be one faithful believer in Christ, whilst another shall continue unbelieving. A father will wish his son to return back from the faith to his former impiety. Foretelling this He saith, I am come to separate. Such shall be the victorious power of the Gospel that sons shall disregard their parents, daughters their mothers, and parents their children, and shall adventure their life and all things for the sake of godliness. Some are of opinion that Christ only applies the passage of Micah, using it in a different sense. But I reply that Micah was speaking literally of the calamity of sinful Jerusalem through the siege of the Chaldeans, as S. Jerome shows—that in it the inhabitants should be so distressed by sword and famine and pestilence that even brother would snatch away bread from brother, child from parent, wife from husband. But, allegorically this strife of the Jews signifies the discord and opposition of unbelieving parents and brethren and husbands against believers, whether Jews, or Gentiles in the time of Christ, especially when the faithful ran into peril of goods and fame, and even life itself. In this allegorical sense Christ cites Micah’s words: and in an allegory, or parable it is not necessary to apply every word. 

He that loveth father, &c. That is, is not worthy to have Me for his Lord and Master, is not worthy of My name and company, My grace and kingdom, and the rest of My promises. The reason is, because Christ forasmuch as He is our God and Lord and Saviour, must be far preferred to parents and children. Wherefore he who prefers them to Christ so as for their sakes to revolt from the faith of Christ, treats Him unworthily, and does Him the highest dishonour. So S. Jerome and others. S. Saturus, when Hunneric threatened him that unless he became an Arian, he would give his wife in marriage to his camel driver, and when his wife, trembling at this, besought him to consent unto the king, answered like another Job, “Thou speakest as one of the foolish women speaketh. I should dread it, 0 woman, if there were nothing but the bitter sweetness of this life. Thou ministerest, 0 my wife to the artifices of the devil. If thou lovedst thy spouse, thou wouldst never drag thine own husband to the second death. Let them tear away my children, let them separate my wife, let them take away my substance, yet will I rest secure upon the promises of my Lord. I will hold fast the words, ‘Whosoever forsaketh not wife, or children, or lands, or houses, he cannot be My disciple.’” So Victor of Utica. 

And he that taketh not (from the hand of the Lord upon his shoulders to bear it like Christ.) his cross, &c. To bear the cross is to be ready for the sake of Christ to bear reproaches, stripes, imprisonments, and the most painful and ignominious death, such as was the death of the cross, which Christ vouchsafed to bear for us. Because, as S. Chrys. says, speaking in the name of Christ “As I have brought you the utmost blessedness; so I ask of you a singular obedience and affection, that ye may be as lions in battle array.” Christ alludes to His future bearing of His own Cross. For it is altogether just and right, that after Christ bearing His cross for us, we also should follow Him, bearing our cross with love and reverence, and thus walk towards heaven. This is the exact literal sense. 

Mystically, the Cross is mortification. Listen to the Gloss, “The Cross is borne in two ways, either when the body is affected by abstinence, or when the mind is touched with compassion for one’s neighbour. Their neighbours’ sins are an instrument of torture to the Saints.” 

Lastly, S. Jerome says, “It is written in another Gospel, He that taketh not his Cross daily, lest we should suppose that a burning faith would suffice once for all: the Cross must be always carried, that we may show that we always love Christ.” 

He that findeth his life, &c. Findeth ought to be in the past tense; for the Gr. is ό εύρ̉ών). The meaning is, He that findeth his life (ψυχὴν), that is, the corporeal safety of his life, when in peril of death, through denial of the faith, and of My name, such a one shall lose his soul (ψυχὴν), that is, the eternal salvation of his soul, which alone is real safety, and shall go away into hell. And, on the other hand, he who shall lose the present life of his soul (ψυχὴς), or his life, on account of his profession of My name, he shall find health and safety, and the eternal happiness and glory of his soul (ψυχὴν), or life. 

He therefore who indulges his soul, loses it: he who mortifies it, saves it. See the paradox which there is here. Life is made to consist in death, and death in life. Whence Tertullian says in his Scorpiace, “God hath willed to destroy death by death, to shake off torments by torments, to give life by taking it away, to heal the flesh by wounding it, to save the soul by casting it away.”