Romans 11:12 - Matthew Poole's English Annotations on the Holy Bible

Another anticipation. The apostle having showed, that the falling away of the Jews was an occasion of the coming in of the Gentiles, it might be objected, that the conversion of the Jews might likewise be an occasion of the falling away of the Gentiles. To this he answers negatively, and confirms his answer by an argument from the less to the greater; that if their fall and diminution were the riches of the Gentiles, their calling again would be so much more: q.d. If God hath made use of the fall and rejection of the Jews, for an occasion of pouring out the riches or abundance of his grace upon the nations; and if the number of believing Jews, being so very small, (which is meant by their diminishing), hath occasioned the conversion of such a multitude of Gentiles; then how much more will their fulness have the effect! How much more their fulness! i.e. their general conversion, the coming in of the Jews, shall so fill the world with wonder, and the gospel with lustre, that a much further accession will be made even to the number of the believing Gentiles.