(2Co 8:22) “And we have sent with them our brother, whom we have oftentimes proved diligent in many things, but now much more diligent, upon the great confidence which I have in you.” “Our brother”. I believe the word “our” is referencing that this man is a Corinthian Believer. When taken as such the “much more diligent” makes sense. He would naturally be spurred to greater faithfulness dealing with those he especially knows.