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

For, if those who are of the law are heirs, faith has been made void, and the promise has been brought to nought;

For this cause it is of faith, that it may be according to grace; to the end that the promise may be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham, who is the father of us all

but, in view of the promise of God, he wavered not through unbelief, but was made strong in faith, giving glory to God,

That is, the children of the flesh are not the children of God; but the children of the promise are reckoned for a seed.

For the word of the promise is this: "At this season I will come, and Sarah shall have a son."