Notes on The Epistle of St. Paul the Apostle to the Romans (Author Bishop Richard Challoner (ed.))
10:3 The justice of God: That is, the justice which God giveth us through Christ; as on the other hand, the Jews' own justice is, that which they pretended to by their own strength, or by the observance of the law, without faith in Christ.
Original Douay-Rheims from Project Gutenberg - Massive cleanup of OCR problems and editing done locally.