अध्यात्मज्ञाननित्यत्वं तत्त्वज्ञानार्थदर्शनम्।एतज्ज्ञानमिति प्रोक्तमज्ञानं यदतोन्यथा॥
adhyātma-jñāna-nityatvaṃ tattva-jñānārtha-darśanametaj jñānam iti proktam ajñānaṃ yad ato ’nyathā
Word by word
The verse says
— constancy in the knowledge of the self, and keeping in view what the knowledge of truth is for. All this is called knowledge. Whatever is other than this is ignorance.
In plain words
The list closes, and the definition lands.
Etaj jñānam iti proktam — all this is called knowledge.
Twenty qualities, almost all of them about conduct, and the chapter calls them knowledge. Then the sharp edge: anything else is ignorance.
Where you've felt this · in study
A driving examiner is not testing whether you can recite the rules. She watches your mirrors, your hands, what you do at the junction where the view is bad. You could know the book perfectly and fail, and both of you would understand exactly why.
Going deeper
Ending a list of behaviours with the word knowledge redefines the word, and the redefinition is the chapter's central claim.
In ordinary use, knowledge is something you have and conduct is what you do with it. This verse collapses that. Patience, straightness, the absence of display and the rest are not applications of knowledge; they are what knowing looks like from outside. The last clause makes it exclusive — whatever is other than this is ignorance — which means an accurate theory held by somebody who needs to be admired does not qualify.
That sits oddly next to the technical analysis of the first seven verses, and the oddness is deliberate.
The analysis is still necessary. What the chapter denies is that holding it is the same as understanding it, and that denial is checkable in the only place it can be: in how somebody behaves when nothing is at stake for them.