Bhagavad Gita · Chapter 13: The Field and the Knower of the Field
Bhagavad Gita 13.2
क्षेत्रज्ञं चापि मां विद्धि सर्वक्षेत्रेषु भारत ।
क्षेत्रक्षेत्रज्ञयोर्ज्ञानं यत्तज्ज्ञानं मतं मम ॥
kṣetrajñaṃ cāpi māṃ viddhi sarvakṣetreṣu bhārata | kṣetrakṣetrajñayorjñānaṃ yattajjñānaṃ mataṃ mama ||
Know me also to be the knower of the field in all fields, Arjuna. Knowledge of the field and of its knower is what I consider true knowledge.
Modern context
Krishna adds: I am the knower in every field. The awareness in each of us is not finally separate; it is the same awareness looking out through every body. And true knowledge, he says, is knowing the difference between the field and the knower. Not knowing facts about the world, but knowing what we are, and what we are not.