Whatever his critics said of Paul, it must have really hurt him. You can almost hear the pleading in his voice as he has come past the, “fine I’ll pretend to be what they say I am” part, now to the, “come one guys. Are you going to make me say it? Can’t you see how much I’ve done for you?” Perhaps the fact that he keeps insisting that he asked for no money means the false apostles asked for a lot, or maybe they tried to convince the Corinthian church to cut Paul out completely. Whatever the case, Paul is trying to win his congregation back, and call them back to the true Christ.