Looking diligently - This phrase implies close attention. It is implied that there are reasons why we should take special care. Those reasons are found in the propensities of our hearts to evil; in the temptations of the world; in the allurements to apostasy presented by the great adversary of our souls.

Lest any man fail - As every man is in danger, it is his personal duty to see to it that his salvation be secure.

Fail of the grace of God - Margin, "fail from." The Greek is, "lest any one be wanting or lacking" - ὑστερῶν husterōn. There is no intimation in the words used here that they already had grace and might fall away - whatever might he true about that - but that there was danger that they might be found at last to be deficient in that religion which was necessary to save them. Whether this was to be by losing the religion which they now had, or by the fact that they never had any however near they may have come to it - the apostle does not here intimate, and this passage should not be used in the discussion of the question about failing from grace. It is a proper exhortation to be addressed to any man in the church or out of it, to inquire diligently whether there is not reason to apprehend that when he comes to appear before God he will be found to be wholly destitute of religion.

Lest any root of bitterness springing up - Any bitter root. There is doubtless an allusion here to Deuteronomy 29:18. "Lest there should be among you man, or woman, or family, or tribe, whose heart turneth away this day from the Lord our God, to go and serve the gods of these nations; lest there should be among you a root that beareth gall and wormwood." The allusion there is to those who were idolaters, and who instead of bearing the fruits of righteousness, and promoting the piety and happiness of the nation, would bear the fruits of idolatry, and spread abroad irreligion and sin. The allusion, in both cases, is to a bitter plant springing up among those that were cultivated for ornament or use, or to a tree bearing bitter and poisonous fruit, among those that produced good fruit. The reference of the apostle is to some person who should produce a similar effect in the church - to one who should inculcate false doctrines; or who should apostatize; or who should lead an unholy life, and thus be the means of corrupting and destroying others. They were to be at especial pains that no such person should start up from among themselves, or be tolerated by them.

Trouble you - By his doctrines and example.

And thereby many be defiled - Led away from the faith and corrupted. One wicked man, and especially one hypocrite in the church, may be the means of destroying many others.

Looking diligently - Επισκοπουντες· Looking about, over, and upon; being constantly on your guard.

Lest any man fail of the grace of God - Μη τις ὑστερων απο της χαριτος του Θεου· Lest any person should come behind, or fall off from, this grace or Gift of God; this state of salvation, viz. the Gospel system or Christianity; for this is most evidently the meaning of the apostle. It is not the falling from a work of grace in their own souls, but from the Gospel, to apostatize from which they had now many temptations; and to guard them against this, the whole epistle was written.

Lest any root of bitterness springing up - A root of bitterness signifies a poisonous plant. The Hebrews call every species of poison a bitter, and with considerable propriety, as most plants are poisonous in proportion to the quantum of the bitter principle they possess. The root of bitterness is here used metaphorically for a bad man, or a man holding unsound doctrines, and endeavoring to spread them in the Church.

Trouble you - This alludes to the effects of poison taken into the body: the whole animal system is disturbed, sometimes violent retchings, great disturbances through the whole alimentary canal, together with the most fatal changes in the whole sanguineous system, are the consequences of poison taken into the stomach. The blood itself (the principle, under God, of life) becomes putrescent; and probably to this the intelligent apostle alludes when he says, and thereby many be defiled, μιανθωσι, corrupted or contaminated.

Bad example and false teaching have corrupted thousands, and are still making desolation in the world and in the Church.

Looking diligently,.... Acting the part of bishops, or overseers, as the word signifies; and so this exhortation either respects officers of the church of the Hebrews, whose business it was more especially to inspect into the principles and practices of the members of it, and take care that they did not imbibe false doctrines, or live immoral lives; or rather the several members of the church, whose business it is to watch over one another, since this epistle seems to be written to the whole church.

Lest any man fail of the grace of God; not the free favour and love of God in Christ, which is everlasting, unchangeable, and from whence there is no separation; nor the grace of God implanted in the heart in regeneration, which is incorruptible, never failing, but always remains, as do faith, hope, and love; but either the whole doctrine of the Gospel, which is a declaration of the grace of God; or particularly the doctrine of free justification by the righteousness of Christ, which men may receive in vain, and fall from, 2 Corinthians 6:1 to which these Hebrews might be prone: and such "fail" of it, who either come short of it, do not come up to it, receive and embrace it; or who having professed it, drop it and deny it: now such should be looked after, and such a case should be diligently looked into; because the glory of God, the honour of Christ, the good of souls, and the well being, and even the continuance of the church state are concerned:

lest any root of bitterness springing up trouble you, and thereby many be defiled; the Alexandrian copy reads , "the many", the common people, the private members of the church; though it may intend either things or persons: it may design things; and these either the corruption of nature in general, which is a root that lies hidden in a man's heart; and is a root or gall of bitterness; and is apt to spring up, and bring forth bitter fruit, and gives trouble both to a man's self and others; and is of a defiling nature, in particular sins; such as malice, strife, and contention, covetousness, lust, pride, oppression, idleness, &c. which make bitter work, and occasion great trouble in churches, oftentimes: or errors and heresies, which sometimes, like roots, lie under ground, secret and undiscovered; and are bitter ones in their effects, bringing ruin and swift destruction on the souls of men; and these sometimes spring up in churches, while ministers and members are asleep, or not so diligent and watchful as they should be; and occasion great trouble, and are very infectious, and defiling: moreover, persons may be designed; which agrees well with Deuteronomy 29:18 from whence this phrase is taken; and with the instance in the following verse, such as all immoral persons, and false teachers, particularly self-justiciaries, that preach the doctrine of justification by the works of the law: this was the capital mistake, and rooted error of the Jewish nation; and a bitter one it was; it produced many bitter fruits of pride and vain glory; and this sprung up in the church, and troubled and defiled many there and elsewhere, being spread by the abettors of it; see Acts 15:24. Now, care should be taken, that no such person be in churches, holding such an error; because of the glory of God, Father, Son, and Spirit; the comfort of souls; the peace of the church, and the growth and increase of it, which must be hurt by such men and doctrines; so , "a sinful root", is used for a "wicked man", in the Apocrypha:

"In those days went there out of Israel wicked men, who persuaded many, saying, Let us go and make a covenant with the heathen that are round about us: for since we departed from them we have had much sorrow.'' (1 Maccabees 1:11)

and , "a root of bitterness", signifies, in Jewish writings (u), an error, or heresy, in opposition to a root of faith, or a fundamental doctrine.

(u) Cosri, Orat. 1. fol. 35. 1.

Looking diligently (ἐπισκοποῦντες)

A.V. gives diligently as the force of ἐπὶ; but ἐπὶ signifies direction rather than intensity. The idea is exercising oversight. Only here and 1 Peter 5:2.

Fail of (ὑστερῶν ἀπὸ)

Rend. "fall back from," implying a previous attainment. The present participle marks something in progress: "lest any one be falling back."

Root of bitterness (ῥίζα πικρίας)

From lxx, Deuteronomy 29:18. A bad man in the church. Ῥίζα of a person, 1 Macc. 1:10.

Springing up (ἄνω φύουσα)

The participle pictures the springing up in progress; the root gradually revealing its pernicious character.

Trouble (ἐνοχλῇ)

Only here and Luke 6:18, see note.

Many be defiled (μιανθῶσιν οἱ πολλοί)

Rend. "the many": the majority of the church. For the verb see on John 18:28.

{10} Looking diligently lest any man fail of the grace of God; lest any {f} root of bitterness springing up trouble you, and thereby many be defiled;

(10) We must study to edify one another both in doctrine and example of life.

(f) That no heresy, or backsliding be an offence.

12:15 Looking diligently lest any man fail of the grace of God. Being careful that no one lags behind and falls by the way so as not to reach the final reward.

Lest any root of bitterness springing up trouble you. Any bitter opposition, or element of disturbance causing members to sin.

12:15 Looking diligently, lest any one - If he do not lift up the hands that hang down. Fall from the grace of God: lest any root of bitterness - Of envy, anger, suspicion. Springing up - Destroy the sweet peace; lest any, not following after holiness, fall into fornication or profaneness. In general, any corruption, either in doctrine or practice, is a root of bitterness, and may pollute many.

fail...; or, fall from

15. lest any . fall-Greek, "lest any (namely, through sloth in running) failing," or "falling short of the grace of God . trouble you." The image is taken from a company of travellers, one of whom lags behind, and so never reaches the end of the long and laborious journey [Chrysostom].

root of bitterness-not merely a "bitter root," which might possibly bring forth sweet fruits; this, a root whose essence is "bitterness," never could. Paul here refers to De 29:18, "Lest there should be among you a root that beareth gall and wormwood" (compare Ac 8:23). Root of bitterness comprehends every person (compare Heb 12:16) and every principle of doctrine or practice so radically corrupt as to spread corruption all around. The only safety is in rooting out such a root of bitterness.

many-rather, "the many," that is, the whole congregation. So long as it is hidden under the earth it cannot be remedied, but when it "springs up," it must be dealt with boldly. Still remember the caution (Mt 13:26-30) as to rooting out persons. No such danger can arise in rooting out bad principles.

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.