That is why all turns upon faith; it is to make the promise a matter of favour, to make it secure for all the offspring, not simply for those who are adherents of the Law but also for those who share the faith of Abraham — of Abraham who is the father of us all
as well as a father of those circumcised persons who not only share circumcision but walk in the steps of the faith which our father Abraham had as an uncircumcised man.