For you know the grace of our Lord Jesus Christ, that, though he was rich, yet for your sakes he became poor, that you through his poverty might be rich.
All Commentaries on 2 Corinthians 8:9 Go To 2 Corinthians 8
Ambrosiaster
AD 400
Paul is saying that Christ was made poor because God deigned to be born as man, humbling the power of his might so that he might obtain for men the riches of divinity and thus share in the divine nature, as Peter says. He was made man in order to take humanity right into the Godhead. Therefore Christ was made poor, not for his sake but for ours, but we are made poor for our own benefit. Commentary on Paul’s Epistles.