Shankaracharya's commentary, trans. Alladi Mahadeva Sastry (1897)
[1]That by which one wrongly understands dharma and adharma, and also what ought to be done and what ought not to be done, that intellect, O Partha, is Rajasic.
BG 18.31
यया धर्मं अधर्मं च कार्यं चाकार्यम् एव च । अयथावत् प्रजानाति बुद्धिः सा पार्थ राजसी ॥
yayā dharmaṃ adharmaṃ ca kāryaṃ cākāryam eva ca | ayathāvat prajānāti buddhiḥ sā pārtha rājasī ||
"Rājasic buddhi: imperfectly/wrongly discerns dharma-adharma and kārya-akārya — not as they really are."
4 translations · all pre-1928 or released to public domain · sources
That by which one wrongly understands dharma and adharma, and also what ought to be done and what ought not to be done, that intellect, O Partha, is Rajasic.
That which has a distorted apprehension of Dharma and its opposite and also of right action and its opposite, that intellect, O Partha, is Rajasika.
MISSING from index.
The intellect which imperfectly discerns right and wrong, that which ought to be done and that which ought not to be done, is of the quality of passion.