{9} Follow peace with all men, and holiness, without which no man shall see the Lord:

(9) We must live in peace and holiness with all men.

People's New Testament

12:14 Follow peace with all men. Live peaceful lives.

And holiness. Pure and sinless lives.

Without which. Without a holy life no one shall be in fellowship with God.

No man shall see the Lord. Realize his presence with us. See Mt 5:8

Wesley's Notes

12:14 Follow peace with all men - This second branch of the exhortation concerns our neighbours; the third, God. And holiness - The not following after all holiness, is the direct way to fall into sin of every kind.

Jamieson-Fausset-Brown Bible Commentary

14. follow peace with all men-with the brethren especially (Ro 14:19), that so the "lame" among them be not "turned out of the way" (Heb 12:13), and that no one of them "fail of the grace of God" (Heb 12:15).

holiness-a distinct Greek word from God's "holiness" (Heb 12:10). Translate here "sanctification." His is absolute holiness: our part is to put on His holiness, becoming "holy as He is holy," by sanctification. While "following peace with all men," we are not so to seek to please them, as to make God's will and our sanctification a secondary object; this latter must be our first aim. (Ga 1:10).

without which-Greek, "apart from which."

no man shall see the Lord-no man as a son; in heavenly glory (Re 22:3, 4). In the East, none but the greatest favorites are admitted to the honor of seeing the king (compare 2Sa 14:24). The Lord being pure and holy, none but the pure and holy shall see Him (Mt 5:8). Without holiness in them, they could not enjoy Him who is holiness itself (Zec 14:20). The connection of purity with seeing the Lord, appears in 1Jo 3:2, 3; Eph 5:5. Contrast Heb 12:16 (compare 1Th 4:3). In Mt 24:30; Re 1:7, it is said that all shall see the Lord; but, that shall be as a Judge, not as their lasting portion and God, which is meant here. The Greek verb does not denote the mere action of seeing, but the seer's state of mind to which the object is presented: so in Mt 5:8 they shall truly comprehend God [Tittmann]. None but the holy could appreciate the holy God, none else therefore shall abide in His presence. "The bad shall only see Him in His form as Son of man [compare Re 1:13, with Re 1:7; and Mt 24:30; Ac 1:11; 17:31]; still it will be in the glory in which He shall judge, not in the lowliness in which He was judged. His form as God, wherein He is equal to the Father, without doubt the ungodly shall not see; for it is only 'the pure in heart who shall see God'" [Augustine]. "He shall come to judge, who stood before a judge. He shall come in the form in which He was judged, that they may see Him whom they pierced: He who was before hidden shall come manifested in power: He, as Judge, shall condemn the real culprits, who was Himself falsely made a culprit."

Matthew Henry's Concise Commentary

12:12-17 A burden of affliction is apt to make the Christian's hands hang down, and his knees grow feeble, to dispirit him and discourage him; but against this he must strive, that he may better run his spiritual race and course. Faith and patience enable believers to follow peace and holiness, as a man follows his calling constantly, diligently, and with pleasure. Peace with men, of all sects and parties, will be favourable to our pursuit of holiness. But peace and holiness go together; there can be not right peace without holiness. Where persons fail of having the true grace of God, corruption will prevail and break forth; beware lest any unmortified lust in the heart, which seems to be dead, should spring up, to trouble and disturb the whole body. Falling away from Christ is the fruit of preferring the delights of the flesh, to the blessing of God, and the heavenly inheritance, as Esau did. But sinners will not always have such mean thoughts of the Divine blessing and inheritance as they now have. It agrees with the profane man's disposition, to desire the blessing, yet to despise the means whereby the blessing is to be gained. But God will neither sever the means from the blessing, nor join the blessing with the satisfying of man's lusts. God's mercy and blessing were never sought carefully and not obtained.