Now the Promises were made to Abraham and to his offspring; it is not said, 'and to your offsprings' in the plural, but in the singular and to your offspring — which is Christ.
For while their discipline was only for a time, and inflicted at their pleasure, he disciplines us for our good, that we may share in his own holiness.
Circumcision is certainly of use, provided you keep the Law; but if you are a breaker of the Law, then your circumcision is turned into uncircumcision.
He had to resemble his brothers in every respect, in order to prove a merciful and faithful high priest in things divine, to expiate the sins of the People.