Cornelius a Lapide

They answered &c Because Christ seemed to imply that they had another father, they wished to learn from Him who he was. We own Abraham, and none other as our father. Jesus saith unto them. If ye are the children of Abraham , do the works of Abraham. It is so in the Vulgate. But some Greek MSS. read as in the English version. He does not deny their extraction, but condemns their doings. Says S. Augustine, “Your flesh may be from Abraham, but not so your life.”