For I testify again to every man that is circumcised, that he is a debtor to do the whole law.
For, х de (G1161)] - 'Yea, not only "Christ shall profit you nothing," BUT you will be debtors to the whole law.'
I testify again to every man - as well as "unto you" (Galatians 5:2).
That is circumcised (present participle) - allowing himself to be circumcised. Such a one became a 'proselyte of righteousness.'
The whole law - impossible for man to keep in part, much less wholly (James 2:10); yet none can be justified by it, unless he keep it wholly (Galatians 3:10).