All you that believe, whether native Jews or Gentiles, are the children of God by adoption, through faith in Jesus Christ, 1 Thessalonians 1:12: so that you need not run back to the law to look for help and salvation from that; but only look unto Christ, to whom the law was but a schoolmaster to lead you; who being fully and clearly revealed, you may have immediate recourse to, by faith; and need not to make use of the Jewish schoolmaster, as hoping for justification from the observances of the law.
Related Commentaries of Galatians 3:26
Galatians 3:26
26 For ye are all the children of God by faith in Christ Jesus.