Bhagavad Gita 18.16

तत्रैवं सति कर्तारमात्मानं केवलं तु यः।पश्यत्यकृतबुद्धित्वान्न स पश्यति दुर्मतिः॥

tatraivaṃ sati kartāramātmānaṃ kevalaṃ tu yaḥ |paśyatyakṛtabuddhitvānna sa paśyati durmatiḥ ||

Now, such being the case, verily he who, owing to an untrained understanding, looks upon his Self, which is isolated, as the agent, he of perverted intelligence does not see.

But the fool, who, due to his immature judgment, supposes that it is his own Self alone that acts, perverts the truth and does not see rightly.

Our plain-language meaning of this verse is waiting for scholar review.