Bhagavad Gita, Chapter 18, Verse 32

अधर्मं धर्ममिति या मन्यते तमसावृता । सर्वार्थान्विपरीतांश्च बुद्धिः सा पार्थ तामसी

adharmaṃ dharmamiti yā manyate tamasāvṛtā | sarvārthānviparītāṃśca buddhiḥ sā pārtha tāmasī

Translation

That which, enveloped in darkness, sees adharma as dharma and all things perverted, that intellect, O Pārtha, is Tāmasic.

— Alladi Mahadeva Sastri

Word meanings

adharmam
wrong
dharmam
right
iti
thus
which
manyate
thinks
tamasā
with darkness
āvṛtā
covered
sarvārthān
all things
viparītān
perverted
ca
and
buddhiḥ
reason
that
pārtha
O Pārtha
tāmasī
tāmasic

Śaṅkarācārya's commentary

It takes quite a perverted view of all things to be known.