For the promise that he should be the heir of the world, was not to Abraham, nor to his posterity, through law, but through the righteousness of faith.

For if they that are of the law be heirs, the faith is made powerless, and the promise is unmeaning;

Therefore, the inheritance is by faith, that it may be according to grace, in order that the promise may be sure to all his posterity, not to those only who are of the law, but to those, also, who are of the faith of Abraham, who is the father of us all,

and he doubted not, through unbelief, with respect to the promise of God, but was 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 counted for the posterity.

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