¹⁶ Therefore it is of faith, that it might be by grace; to the end the promise might 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,

²⁰ He staggered not at the promise of God through unbelief; but was strong in faith, giving glory to God;

²¹ And being fully persuaded that, what he had promised, he was able also to perform.