But I trust ... - The sense of this verse is,” Whatever may be the result of your examination of yourselves, I trust (Greek I hope) you will not find us false and to be rejected; that is, I trust you will find in me evidence that I am commissioned by the Lord Jesus to be his apostle.” The idea is, that they would find when he was among them, that he was endowed with all the qualifications needful to confer a claim to the apostolic office.
Related Commentaries of 2 Corinthians 13:6
2 Corinthians 13:6
6 But I trust that ye shall know that we are not reprobates.