18.31 O Partha, sa, that; buddhih, intellect; is rajasi, born of rajas; yaya, with which; prajanati, one understands; ayathavat, wrongly, not truly, not by discerning it from all points of view; dharmam, virtue, as prescribed by the scritpures; and adharmam, vice, what is prohibited by them; [By dharma and adharma are implied the seen and the unseen results of actions as revealed by the scriptures; karya and akarya respectively refer to the actual doing of what ought to be done and the not doing of what ought not to be done.] ca eva, as also; karyam, what ought to be done; and akaryam, what ought not to be done-those very 'duty' and 'what is not duty' as stated earlier.

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18.31 O Partha, that intellect is born of rajas with which one wrongly understands virtue and vice as also what ought to be done and ought not to be done.