For it was not by law that the promise was to Abraham, or to his seed, that he should be heir of the world, but by righteousness of faith.

For if they which are of law be heirs, faith is made vain, and the promise made of no effect.

Therefore it is on the principle of faith, that it might be according to grace, in order to the promise being sure to all the seed, not to that only which is of the law, but to that also which is of Abraham's faith, who is father of us all,

and hesitated not at the promise of God through unbelief; but found strength in faith, giving glory to God;

That is, they that are the children of the flesh, these are not the children of God; but the children of the promise are reckoned as seed.

For this word is of promise, According to this time I will come, and there shall be a son to Sarah.