Paul's argument that God shows no partiality challenges both Gentile moral superiority and Jewish presumption based on possessing God's law without keeping it. His teaching that circumcision profits only if one keeps the law while uncircumcised law-keepers are considered circumcised reveals how external religious markers cannot substitute for heart obedience. The principle that God will judge according to deeds through Jesus Christ applies universally, making both Jews and Gentiles accountable for their response to divine revelation.