20 And to the Jews I was as a Jew, so that I might give the good news to them; to those under the law I was the same, not as being myself under the law, but so that I might give the good news to those under the law. 21 To those without the law I was as one without the law, not as being without law to God, but as under law to Christ, so that I might give the good news to those without the law. 22 To the feeble, I was as one who is feeble, so that they might have salvation: I have been all things to all men, so that some at least might have salvation.
Matthew Henry's Commentary on 1 Corinthians 9:20-22
Commentary on 1 Corinthians 9:15-23
(Read 1 Corinthians 9:15-23)
It is the glory of a minister to deny himself, that he may serve Christ and save souls. But when a minister gives up his right for the sake of the gospel, he does more than his charge and office demands. By preaching the gospel, freely, the apostle showed that he acted from principles of zeal and love, and thus enjoyed much comfort and hope in his soul. And though he looked on the ceremonial law as a yoke taken off by Christ, yet he submitted to it, that he might work upon the Jews, do away their prejudices, prevail with them to hear the gospel, and win them over to Christ. Though he would transgress no laws of Christ, to please any man, yet he would accommodate himself to all men, where he might do it lawfully, to gain some. Doing good was the study and business of his life; and, that he might reach this end, he did not stand on privileges. We must carefully watch against extremes, and against relying on any thing but trust in Christ alone. We must not allow errors or faults, so as to hurt others, or disgrace the gospel.