Treasury of Scripture Knowledge
Ye are the children of the prophets, and of the covenant which God made with our fathers, saying unto Abraham, And in thy seed shall all the kindreds of the earth be blessed.
He dealt pitifully with our forefathers, And remembered His holy covenant,
To them belongs recognition as God's sons, and they have His glorious Presence and the Covenants, and the giving of the Law, and the Temple service, and the ancient Promises.
My meaning is that Christ has become a servant to the people of Israel in vindication of God's truthfulness-- in showing how sure are the promises made to our forefathers--
And if you belong to Christ, then you are indeed true descendants of Abraham, and are heirs in fulfilment of the promise.
Again, the promise that he should inherit the world did not come to Abraham or his posterity conditioned by Law, but by faith-righteousness.
And the Scripture, foreseeing that in consequence of faith God would declare the nations to be free from guilt, sent beforehand the Good News to Abraham, saying, "In you all the nations shall be blessed."
But you, brethren, like Isaac, are children born in fulfilment of a promise.