2 Corinthians 3:4

And such confidence have we through Christ to Godward.

"The changed lives at Corinth confirm Paul's confidence of his divine appointment."[13] Thus, not merely all people, but Paul himself also could read the proof of his apostolic commission in the great harvest of souls won for the Lord in Corinth. How natural, therefore, it was for him to point out to others what was so starkly clear to himself.