Chapter 13 · The Field and the Knower · Krishna said
Bhagavad Gita 13.3 — The Knower in all fields
क्षेत्रज्ञं चापि मां विद्धि सर्वक्षेत्रेषु भारत। क्षेत्रक्षेत्रज्ञयोर्ज्ञानं यत्तज्ज्ञानं मतं मम ॥
kṣetrajñaṃ cāpi māṃ viddhi sarvakṣetreṣu bhārata | kṣetrakṣetrajñayorjñānaṃ yattajjñānaṃ mataṃ mama ||
Meaning
Know me also as the knower in all fields, Arjuna. Understanding the field and its knower — that, in my view, is true knowledge.
In today's life
The same divine presence that lives in you lives in everyone, which is a strong reason to treat all with respect.