For not by the law [came] the promise to Abraham and his seed, that he should be heir of the world, but by the righteousness of faith.

For if they who are of the law are heirs, faith becomes vain, and the promise is useless:

Therefore it is by faith, that it might be of grace; in order that the promise might be secured to all the seed; not only to that which is of the law, but to that which is of the faith of Abraham; who is the father of us all,

for he disputed not against the promise of God with unbelief; but was mighty in faith, giving glory to God;

That is, not the children of the flesh, these are the children of God: but the children of the promise are accounted for the seed.

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