For they verily for a few days, etc. The second amplification of the subject, as I have said, is that God's chastisements are appointed to subdue and mortify our flesh, so that we may be renewed for a celestial life. It hence appears that the fruit or benefit is to be perpetual; but such a benefit cannot be expected from men, since their discipline refers to civil life, and therefore properly belongs to the present world. It hence follows that these chastisements bring far greater benefit, as the spiritual holiness conferred by God far exceeds the advantages which belong to the body. Were any one to object and say, that it is the duty of parents to instruct their children in the fear and worship of God, and that therefore their discipline seems not to be confined to so short a time; to this the answer is, that this is indeed true, but the Apostle speaks here of domestic life, as we are wont commonly to speak of civil government; for though it belongs to magistrates to defend religion, yet we say that their office is confined to the limits of this life, for otherwise the civil and earthly government cannot be distinguished from the spiritual kingdom of Christ. Moreover when God's chastisements are said to be profitable to make men partners of his holiness, this is not to be so taken as though they made us really holy, but that they are helps to sanctify us, for by them the Lord exercises us in the work of mortifying the flesh.

For they verily for a few days - That is, with reference to a few days (πρὸς pros}}; or it was a chastisement that had reference mainly to this short life. The apostle seems to bring in this circumstance to contrast the dealings of earthly parents with those of God. One of the circumstances is, that the corrections of earthly parents had a much less important object than those of God. They related to this life - a life so brief that it may be said to continue but a "few days." Yet, in order to secure the benefit to be derived for so short a period from fatherly correction, we submitted without complaining. Much more cheerfully ought we to submit to that discipline from the hand of our heavenly Father which is designed to extend its benefits through eternity. This seems to me to afford a better sense than that adopted by Prof. Stuart and others, that it means "during our childhood or minority;" or than that proposed by Doddridge, that it refers both to our earthly parents and to our heavenly Father.
After their own pleasure - Margin, "as seemed good, or meet to them." Meaning that it was sometimes done arbitrarily, or from caprice, or under the influence of passion. This is an additional reason why we should submit to God. We submitted to our earthly parents, though their correction was sometimes passionate, and was designed to gratify their own pleasure rather than to promote our good. There is much of this kind of punishment in families; but there is none of it under the administration of God.
But he for our profit - Never from passion, from caprice, from the love of power or superiority, but always for our good. The exact benefit which he designs to produce we may not be able always to understand, but we may be assured that no other cause influences him than a desire to promote our real welfare, and as he can never be mistaken in regard to the proper means to secure that, we may be assured that our trials are always adapted to that end.
That we might be partakers of his holiness - Become so holy that it may be said that we are partakers of the very holiness of God; compare 2-Peter 1:4. This is the elevated object at which God aims by our trials. It is not that he delights to produce pain; not that he envies us and would rob us of our little comforts; not that he needs what we prize to increase his own enjoyment, and therefore rudely takes it away; and not that he acts from caprice - now conferring a blessing and then withdrawing it without any reason: it is, that he may make us more pure and holy, and thus promote our own best interest. To be holy as God is holy; to be so holy that it may be said that we "are partakers of his holiness," is a richer blessing than health, and property, and friends, without it; and when by the exchange of the one we acquire the other, we have secured infinitely more than we have lost. To obtain the greater good we should be willing to part with the less; to secure the everlasting friendship and favour of God we should be willing, if necessary, to surrender the last farthing of our property; the last friend that is left us; the last feeble and fluttering pulsation of life in our veins.

For - a few days - The chastisement of our earthly parents lasted only a short time; that of our heavenly Father will also be but a short time, if we submit: and as our parents ceased to correct when we learned obedience; so will our heavenly Father when the end for which he sent the chastisement is accomplished. God delights not in the rod; judgment is his strange work.

(7) For they verily for a few days chastened [us] after their own pleasure; but he for [our] profit, that [we] might be partakers of his holiness.
(7) An amplification of the same argument: Those fathers have corrected us after their fancy, for some frail and temporary good: but God chastens and instructs us for our singular good to make us partakers of his holiness: which although our senses do not presently perceive it, yet the end of the matter proves it.

For they verily for a few days chastened us,.... Which respects not the minority of children, during which time they are under the correction of parents, and which is but a few days; nor the short life of parents; but rather the end which parents have in chastening their children, which is their temporal good, and which lasts but for a few days; which sense the opposition in the latter part of the text requires: and this they do
after their own pleasure: not to please and delight themselves in the pains and cries of their children, which would be brutish and inhuman; though corrections are too often given to gratify the passions; nor merely in an arbitrary way, and when they please; but the sense is, they correct as seems good unto them; in the best way and manner; to the best of their judgments, which are fallible:
but he for our profit; saints are no losers by afflictions; they lose nothing but their dross and tin; they do not lose the love of God; nor their interest in the covenant of grace; nor the presence of God; nor grace in their own hearts; nor spiritual peace and comfort: on the contrary, they are real gainers by them; their graces gain by them fresh lustre and glory; they obtain a greater degree of spiritual knowledge; and a larger stock of experience; and are hereby restored to their former state, duty, and zeal; and become more conformable to Christ; yea, their afflictions conduce to their future glory; many are the profits arising from them. The Alexandrian copy reads in the plural number, "profits": particularly God's end in chastening of his children is,
that we might be partakers of his holiness; not the essential holiness of God, which is incommunicable; but a communicative holiness of his, which it is his determining will his people should have: it comes from him, from whom every good and perfect gift does; it is in Christ for them, and is received out of his fulness; and is wrought in them by the Spirit; and it bears a resemblance to the divine nature: now men are naturally destitute of this holiness; they have it not by nature, but by participation; as God's gift; and they first partake of it in regeneration; and here an increase of it is designed, a gradual participation of it; and it may include perfect holiness in heaven: afflictions are designed as means to bring persons to this end; to bring them to a sense of sin, an acknowledgment of it, an aversion to it, and to a view of pardon of it; to purge it away; to wean the saints from this world; to increase their grace, and lead them on to a perfect state of glory, where there will be no more sin, and no more sorrow.

Showing wherein the chastisement of our heavenly Father is preferable to that of earthly fathers.
for a few days--that is, with a view to our well-being in the few days of our earthly life: so the Greek.
after their own pleasure--Greek, "according to what seemed fit to themselves." Their rule of chastening is what may seem fit to their own often erring judgment, temper, or caprice. The two defects of human education are: (1) the prevalence in it of a view to the interests of our short earthly term of days; (2) the absence in parents of the unerring wisdom of our heavenly Father. "They err much at one time in severity, at another in indulgence [1-Samuel 3:13; Ephesians 6:4], and do not so much chasten as THINK they chasten" [BENGEL].
that we might be partakers of his holiness--becoming holy as He is holy (John 15:2). To become holy like God is tantamount to being educated for passing eternity with God (Hebrews 12:14; 2-Peter 1:4). So this "partaking of God's holiness" stands in contrast to the "few days" of this life, with a view to which earthly fathers generally educate their sons.

For they verily for a few days - How few are even all our day on earth! Chastened us as they thought good - Though frequently they erred therein, by too much either of indulgence or severity. But he always, unquestionably, for our profit, that we may be partakers of his holiness - That is, of himself and his glorious image.