What, then, though some of them did not believe? Shall their unbelief make the promise of God without effect?

For the promise that he should be heir of the world was not given to Abraham, or to his seed, through the law: but through the righteousness which cometh of faith.

For if they which are of the law be heirs, then is faith but vain, and the promise of none effect.

Therefore by faith is the inheritance given, that it might come of favour: and that the promise might be sure to all the seed. Not to them only which are of the law: but also to them which are of the faith of Abraham, which is the father of us all.

He staggered not at the promise of God through unbelief: But was made strong in the faith, and gave honour to God,

that is to say; They which are the children of the flesh, are not the children of God. But the children of promise are counted the seed.

For this is a word of promise, "About this time will I come, and Sara shall have a son."