For we (hmei gar). We believers in Christ, the children of Abraham by faith, whether Jew or Gentile, the spiritual circumcision in contrast to the merely physical ( Romans 2:25-29 ; Colossians 2:11 ; Ephesians 2:11 ). See Galatians 5:12 for apotemnein (to cut off) in sense of mutilation also. By the Spirit of God (pneumati qeou). Instrumental case, though the dative case as the object of latreuw makes good sense also (worshipping the Spirit of God) or even the locative (worshipping in the Spirit of God). No (ouk). Actual condition rather than mh with the participle. In the flesh (en sarki). Technical term in Paul's controversy with the Judaizers ( 2 Corinthians 11:18 ; Galatians 6:13 ). External privileges beyond mere flesh.