John Gill Commentary 2 Corinthians 13:6

"But I hope that ye shall know that we are not reprobate." — 2 Corinthians 13:6 (ASV)

But I trust that you shall know
Whether they were reprobates or not, the apostle would not pretend to say; that he left to themselves, and of which they were capable of making judgment for themselves: however, he hoped and believed, that he and his fellow apostles would give such proof of themselves, as that they should know certainly that we ,
says he, are not reprobates ;
men void of judgment in the doctrines of the Gospel, but have light, knowledge, and understanding in them; or useless and unprofitable in the ministry, but were the savour of life to life to many; were ministers by whom others believed; were successful labourers in the Lord's vineyard, and builders in his house; and were made very useful for the conversion, comfort, and edification of many souls: or that they were not men disapproved either by God, or his people; since as they faithfully served Christ in the ministration of the Gospel, they were acceptable to God, and approved of men: or were not men without a proof of Christ speaking in them; they might assure themselves they would have too soon, for some of them, an evidence of that power and authority which Christ has lodged in them, to punish such as repented not of their evils.