1 Corinthians 9:2

“If I be not an apostle unto others, etc.] This is said by way of supposition, not concession; for he was an apostle to many others; he was an apostle of the Gentiles in general; as the apostleship of the circumcision belonged to Peter, that of the uncircumcision fell to his share: but however, as if he should say, be that as it will, yet doubtless I am to you; all the signs of apostleship were wrought among them; not only the grace of God was implanted in them under his ministry, but the extraordinary gifts of the Spirit were received by them through it; and many signs, wonders, and mighty deeds, were done in the midst of them by him: (see <471212>2 Corinthians 12:12) which were sufficient…”

“yet doubtless--yet at least I am such to you. seal of mine apostleship--Your conversion by my preaching, accompanied with miracles ("the signs of an apostle," Rom 15:18-19; Co2 12:12), and your gifts conferred by me (Co1 1:7), vouch for the reality of my apostleship, just as a seal set to a document attests its genuineness (Joh 3:33; Rom 4:11).”

“If I be not an apostle unto others - “If I have not given evidence to others of my apostolic mission; of my being sent by the Lord Jesus, yet I have to you. Assuredly you, among whom I have labored so long and so successfully, should not doubt that I am sent from the Lord. You have been well acquainted with me; you have witnessed my endowments, you have seen my success, and you have had abundant evidence that I have been sent on this great work. It is therefore strange in you to doubt my apostolic commission; and it is unkind in you so to construe my declining to accept your contributions and aid for my support, as if I were conscious that I was not entitled to that.” For the seal of mine…”

“Ye are the seal of my apostleship - Who have received not only faith by my mouth, but all the gifts of the Spirit by my hands. 1 Corinthians 9:3”

“for: Joh 6:27; Co2 3:1-3, Co2 12:12 1 Corinthians 9:3”