John Calvin Commentary 2 Corinthians 9:3

"But I have sent the brethren, that our glorying on your behalf may not be made void in this respect; that, even as I said, ye may be prepared:" — 2 Corinthians 9:3 (ASV)

But I have sent the brethren. He now presents the reason why, even though he holds a favorable opinion of their willingness, he nevertheless carefully exhorts them. “I am considering,” he says, “my own good name and yours; for since I promised on your behalf, we would both be disgraced if words and deeds did not correspond. Therefore, you should view my concerns favorably.”