For example, circumcision is valuable if you follow the laws in Moses’ Teachings. If you don’t follow those laws, your circumcision amounts to uncircumcision.
The promises were spoken to Abraham and to his descendant. Scripture doesn’t say, “descendants,” referring to many, but “your descendant,” referring to one. That descendant is Christ.
Therefore, he had to become like his brothers and sisters so that he could be merciful. He became like them so that he could serve as a faithful chief priest in God’s presence and make peace with God for their sins.