For if someone comes and proclaims another Jesus different from the one we proclaimed, or if you receive a different spirit than the one you received, or a different gospel than the one you accepted, you put up with it well enough!

For we are writing to you nothing different from what we have written before, or from what indeed you already recognize as truth and will, I trust, recognize as such to the very end;

And we have sent [i.e., are sending] with them our brother [Note: This is a different person from the one mentioned in verse 18], who has often proven his diligence to us in many ways, and is now proving to be even more diligent because of the great confidence he has in you [i.e., confidence in the Corinthians completing their collection for the poor].

Do not be unequally bound together with unbelievers [do not make mismatched alliances with them, inconsistent with your faith]. For what partnership can righteousness have with lawlessness? Or what fellowship can light have with darkness?