Bhagavad Gita Chapter 13, Verse 12

अध्यात्मज्ञाननित्यत्वं तत्त्वज्ञानार्थदर्शनम् | एतज्ज्ञानमिति प्रोक्तमज्ञानं यदतोऽन्यथा ||

adhyātma-jñāna-nityatvaṁ tattva-jñāna-artha-darśanam etaj jñānam iti proktam ajñānaṁ yad ato 'nyathā

Constancy in knowledge of the Self, and vision of the purpose of knowledge of truth—this is called knowledge. What is otherwise is ignorance.

Krishna completes the description of knowledge qualities. 'Adhyātma-jñāna-nityatvam'—constancy in knowledge of the Self. This means continuously practicing the understanding of the distinction between field and knower. Not just understanding it once, but maintaining that understanding constantly. 'Tattva-jñāna-artha-darśanam'—vision of the purpose of knowledge of truth. This means seeing the purpose—why you're seeking this knowledge. The purpose is to recognize the distinction between field and knower, to realize your true nature. 'Etaj jñānam iti proktam'—this is called knowledge. All the qualities listed (verses 13.8-12) create true knowledge—the understanding of the distinction between field and knower. 'Ajñānaṁ yad ato 'nyathā'—what is otherwise is ignorance. Anything that doesn't lead to this understanding is ignorance. Knowledge isn't accumulation of information. Knowledge is understanding the distinction between field and knower. This understanding is realized through the qualities listed. Without these qualities, you remain in ignorance, confused about the distinction.