Ambrosiaster — on Rom 11:13 (COMMENTARY ON PAUL'S EPISTLES)

“Paul is showing the Gentiles here how much he loves the Jews. For he magnifies his ministry, by which he is the apostle of the Gentiles, if by loving his own people he wins them to the faith as well. For he is more honored still if he wins to eternal life those to whom he has not been sent. For he who finds his lost brothers will have the greatest honor with his parents.”