matthew 5:9 Blessed are the peacemakers: for they shall be called the children of God. - Free Bible Online

      9. Blessed are the peacemakers--who not only study peace, but diffuse it.
      for they shall be called the children of God--shall be called sons of God. Of all these beatitudes this is the only one which could hardly be expected to find its definite ground in the Old Testament; for that most glorious character of God, the likeness of which appears in the peacemakers, had yet to be revealed. His glorious name, indeed--as "The Lord, the Lord God, merciful and gracious, long-suffering, and abundant in goodness and truth, forgiving iniquity and transgression and sin"--had been proclaimed in a very imposing manner (Ex 34:6), and manifested in action with affecting frequency and variety in the long course of the ancient economy. And we have undeniable evidence that the saints of that economy felt its transforming and ennobling influence on their own character. But it was not till Christ "made peace by the blood of the cross" that God could manifest Himself as "the God of peace, that brought again from the dead our Lord Jesus, that great Shepherd of the sheep, through the blood of the everlasting covenant" (Heb 13:20) --could reveal Himself as "in Christ reconciling the world unto Himself, not imputing their trespasses unto them," and hold Himself forth in the astonishing attitude of beseeching men to be "reconciled to Himself" (2Co 5:19, 20). When this reconciliation actually takes place, and one has "peace with God through our Lord Jesus Christ"--even "the peace of God which passeth all understanding"--the peace-receivers become transformed into peace-diffusers. God is thus seen reflected in them; and by the family likeness these peacemakers are recognized as the children of God. In now coming to the eighth, or supplementary beatitude, it will be seen that all that the saints are in themselves has been already described, in seven features of character; that number indicating completeness of delineation. The last feature, accordingly, is a passive one, representing the treatment that the characters already described may expect from the world. He who shall one day fix the destiny of all men here pronounces certain characters "blessed"; but He ends by forewarning them that the world's estimation and treatment of them will be the reserve of His.

JFB.