Here observe, I. The apostle makes an apology for seeming to commend himself and his fellow-labourers (Co2 5:13), and tells them, 1. It was not to commend themselves, nor for their own sakes, that he had spoken of their fidelity and diligence in the former verses; nor was he willing to suspect their good opinion of him. But, 2. The true reason was this, to put an argument in their mouths wherewith to answer his accusers, who made vain boastings, and gloried in appearances only; that he might give them an occasion to glory on their behalf, or to defend them against the reproaches of their adversaries. And if the people can say that the word has been manifested to their consciences, and been effectual to their conversion and edification, this is the best defence they can make for the ministry of the word, when they are vilified and reproached.

II.He gives good reasons for their great zeal and diligence. Some of Paul's adversaries had, it is likely, reproached him for his zeal and fervour, as if he had been a madman, or, in the language of our days, a fanatic; they imputed all to enthusiasm, as the Roman governor told him, Much learning has made thee mad, Act 26:24. But the apostle tells them, 1. It was for the glory of God, and the good of the church, that he was thus zealous and industrious: "Whether we be beside ourselves, or whether we be sober (whether you or others do think the one or the other), it is to God, and for his glory: and it is for your cause, or to promote your good," Co2 5:13. If they manifested the greatest ardour and vehemency at some times, and used the greatest calmness in strong reasonings at other times, it was for the best ends; and in both methods they had good reason for what they did. For, 2. The love of Christ constrained them, Co2 5:14. They were under the sweetest and strongest constraints to do what they did. Love has a constraining virtue to excite ministers and private Christians in their duty. Our love to Christ will have this virtue; and Christ's love to us, which was manifested in this great instance of his dying for us, will have this effect upon us, if it be duly considered and rightly judged of. For observe how the apostle argues for the reasonableness of love's constraints, and declares, (1.) What we were before, and must have continued to be, had not Christ died for us: We were dead, Co2 5:14. If one died for all, then were all dead; dead in law, under sentence of death; dead in sins and trespasses, spiritually dead. Note, This was the deplorable condition of all those for whom Christ died: they were lost and undone, dead and ruined, and must have remained thus miserable for ever if Christ had not died for them. (2.) What such should do, for whom Christ died; namely, that they should live to him. This is what Christ designed, that those who live, who are made alive unto God by means of his death, should live to him that died for them, and rose again for their sakes also, and that they should not live to themselves, Co2 5:15. Note, We should not make ourselves, but Christ, the end of our living and actions: and it was one end of Christ's death to cure us of this self-love, and to excite us always to act under the commanding influence of his love. A Christian's life should be consecrated to Christ; and then do we live as we ought to live when we live to Christ, who died for us.

For the love of Christ constraineth us - We have the love of God shed abroad in our hearts, and this causes us to love God intensely, and to love and labor for the salvation of men. And it is the effect produced by this love which συνεχει ἡμας, bears us away with itself, which causes us to love after the similitude of that love by which we are influenced; and as God so loved the world as to give his Son for it, and as Christ so loved the world as to pour out his life for it, so we, influenced by the very same love, desire to spend and be spent for the glory of God, and the salvation of immortal souls. By the fear of God the apostles endeavored to persuade and convince men, and the love of Christ constrained them so to act.

If one died for all, then were all dead - The first position the apostle takes for granted; viz. that Jesus Christ died for All mankind. This no apostolic man nor primitive Christian ever did doubt or could doubt.

The second position he infers from the first, and justly too; for if all had not been guilty, and consigned to eternal death because of their sins there could have been no need of his death. Therefore, as he most certainly died for All, then all were dead, and needed his sacrifice, and the quickening power of his Spirit.

And that he died for all, that they which live,.... The end of Christ's dying for men was that they might live; live, in a legal sense, live a life of justification; and that they which live in such a sense,

should not henceforth live unto themselves: to their own lusts, and after their own wills, to either sinful self, or righteous self:

but unto him which died for them, and rose again; that is, for them, for their justification; for all those for whom Christ died, for them he rose again; and who were justified, acquitted, and discharged when he was; which cannot be said of all mankind; and which is an obligation on such persons to live to Christ, to ascribe the whole of their salvation to him, and to make his glory the end of all their actions. Some copies read, "which died for them all".

For--Accounting for his being "beside himself" with enthusiasm: the love of Christ towards us (in His death for us, the highest proof of it, Rom 5:6-8), producing in turn love in us to Him, and not mere "terror" (Co2 5:11).

constraineth us--with irresistible power limits us to the one great object to the exclusion of other considerations. The Greek implies to compress forcibly the energies into one channel. Love is jealous of any rival object engrossing the soul (Co2 11:1-3).

because we thus judge--literally, "(as) having judged thus"; implying a judgment formed at conversion, and ever since regarded as a settled truth.

that if--that is, that since. But the oldest manuscripts omit "if." "That one died for all (Greek, 'in behalf of all')." Thus the following clause will be, "Therefore all (literally, 'the all,' namely, for whom He 'died') died." His dying is just the same as if they all died; and in their so dying, they died to sin and self, that they might live to God their Redeemer, whose henceforth they are (Rom 6:2-11; Gal 2:20; Col 3:3; Pe1 4:1-3).