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And he received the sign of circumcision, a seal of the righteousness of the faith which he had while still uncircumcised, that he might be the father of all those who believe, though they are uncircumcised, that righteousness might be imputed to them also,
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and the father of circumcision to those who not only are of the circumcision, but who also walk in the steps of the faith which our father Abraham had while still uncircumcised.
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For the promise that he would be the heir of the world was not to Abraham or to his seed through the law, but through the righteousness of faith.
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For if those who are of the law are heirs, faith is made void and the promise made of no effect,
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because the law brings about wrath; for where there is no law there is no transgression.
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Therefore it is of faith that it might be according to grace, so that the promise might be sure to all the seed, not only to those who are of the law, but also to those who are of the faith of Abraham, who is the father of us all
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(as it is written, "I have made you a father of many nations") in the presence of Him whom he believed--God, who gives life to the dead and calls those things which do not exist as though they did;
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who, contrary to hope, in hope believed, so that he became the father of many nations, according to what was spoken, "So shall your descendants be."
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And not being weak in faith, he did not consider his own body, already dead (since he was about a hundred years old), and the deadness of Sarah's womb.
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He did not waver at the promise of God through unbelief, but was strengthened in faith, giving glory to God,
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and being fully convinced that what He had promised He was also able to perform.