9-12. Cometh this blessedness then, &c.—that is, "Say not, All this is spoken of the circumcised, and is therefore no evidence of God's general way of justifying men; for Abraham's justification took place long before he was circumcised, and so could have no dependence upon that rite: nay, 'the sign of circumcision' was given to Abraham as 'a seal' (or token) of the (justifying) righteousness which he had before he was circumcised; in order that he might stand forth to every age as the parent believer—the model man of justification by faith—after whose type, as the first public example of it, all were to be moulded, whether Jew or Gentile, who should thereafter believe to life everlasting."

     13-15. For the promise, &c.—This is merely an enlargement of the foregoing reasoning, applying to the law what had just been said of circumcision.