Bhagavad Gita · Chapter 18: Freedom through Renunciation

Bhagavad Gita 18.31

yayā dharmamadharmaṃ ca kāryaṃ cākāryameva ca | ayathāvatprajānāti buddhiḥ sā pārtha rājasī ||

The understanding by which a person grasps wrongly what is right and what is wrong, what should be done and what should not: that understanding, Arjuna, is of passion.

Modern context

Rajasic understanding gets right and wrong muddled. It is not wholly blind, but it sees through the haze of its own desires and so misjudges. This is the condition of a person who means well but whose wants keep distorting their judgment. They know the difference between right and wrong in principle, but in the moment their craving tips the scales.