|Chapter 18, Verse 32|
अधर्मं धर्ममिति या मन्यते तमसाऽऽवृता।सर्वार्थान्विपरीतांश्च बुद्धिः सा पार्थ तामसी।।18.32।।
Transliteration / Meaning
adharmaṁ dharmam iti yā manyate tamasāvṛitā
sarvārthān viparītānśh cha buddhiḥ sā pārtha tāmasī
Translation
That understanding which considers irreligion to be religion and religion to be irreligion, under the spell of illusion and darkness, and strives always in the wrong direction, O Partha, is in the mode of ignorance.
Purport by Srila Prabhupada
Intelligence in the mode of ignorance is always working the opposite of the way it should. It accepts religions which are not actually religions and rejects actual religion. Men in ignorance understand a great soul to be a common man and accept a common man as a great soul. They think truth to be untruth and accept untruth as truth. In all activities they simply take the wrong path; therefore their intelligence is in the mode of ignorance.