yayā — by which;  dharmam — the principles of religion;  adharmam — irreligion;  ca — and;  kāryam — what ought  to be done;  ca — also;  akāryam — what ought not  to be done;  eva — certainly;  ca — also;  ayathā- vat — imperfectly;  prajānāti — knows;  buddhiḥ — intelligence;  sā — that;  pārtha —  O son of  Pṛthā;  rājasī —  in the mode of passion.

O son of Pritha, that understanding which cannot distinguish between religion and irreligion, between action that should be done and action that should not be done, is in the mode of passion.