I have become a fool in boasting; you have compelled me. For I ought to have been commended by you; for in nothing was I behind the most eminent apostles, though I am nothing. 12 Truly the signs of an apostle were accomplished among you with all perseverance, in signs and wonders and mighty deeds. 13 For what is it in which you were inferior to other churches, except that I myself was not burdensome to you? Forgive me this wrong! —2 Corinthians 12:11-13.
The distinctive and authenticating ‘signs, wonders and mighty deeds’ of a true apostle have been worked through Paul, clearly differentiating him from false apostles. The church witnessed those things. The only difference between the Corinthian church and other churches was that Paul did not rely on them for support. He asks them to forgive him for that! [The Bible Panorama.]