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.
that he should be the heir of the world--or, that "all the families of
the earth should be blessed in him."
was not to Abraham or to his seed through the law--in virtue of
obedience to the law.
but through the righteousness of faith--in virtue of his simple faith
in the divine promises.
JFB.
Picture Study Bible