Opulence means six kinds of opulences, ṣaḍ-aiśvarya-pūrṇa: all wealth, all fame, all strength, all beauty, all knowledge, all renunciation. These are the opulences. We can have some money. You have some money, I have got some money, but none of us can claim that "I have got all the monies." That is not possible. That is claimed by Bhagavān. I have got some strength, you have got some strength, but nobody of us can claim that "I have got all the strength."
So one who possesses all the wealth, all the strength, all the fame, all beauty, all knowledge, all renunciation, he is called Bhagavān. The meaning of bhagavān is this, ṣaḍ-aiśvarya-pūrṇam. Therefore Vyāsadeva says, bhagavān uvāca. He is not ordinary person who is speaking. Who is full with all knowledge, because that is the qualification of Bhagavān. He is competent with all knowledge. So bhagavān uvāca.
So what does He, Bhagavān, says? Idaṁ śarīraṁ kaunteya kṣetram ity abhidhīyate: (BG 13.2) "My dear Kaunteya, Arjuna..." Arjuna's another name is Kaunteya because he is the son of Kuntī. His mother's name is Kuntī. Therefore he is addressed as Kaunteya. And Kuntī has got relationship with Kṛṣṇa. Kuntī is the sister of Kṛṣṇa's father, Vasudeva. Therefore out of affection for his aunt, He is addressing Arjuna as the son of his aunt Kuntī, Kaunteya. Idaṁ śarīraṁ kaunteya kṣetram (BG 13.2), the field of activity, ity abhidhīyate. His two answers. Out of the six questions—kṣetra, kṣetra-jña, prakṛti, puruṣa, jñānam, jñeyam—He is answering the first two, pair.
What is kṣetra? So Kṛṣṇa said, "This body is the kṣetra." Kṣetra means this body. And kṣetra-jña... Etad yo vetti: "This body, one who knows this body," etad yo vetti taṁ prāhuḥ kṣetra-jñaḥ, "he is called kṣetra-jña." Just like I know my body. The pains and pleasure of my body, the necessities of my body, how I am situated in this body—I know. You also know, you, about your body. And my... About my body you do not know, what pains and pleasure I am feeling. What pains and pleasure you are feeling, I do not know. But I know the pains and pleasure of my body. You know the pains and pleasure of your body. Therefore, in relationship with your body, you are kṣetra-jña, and in relationship with my body I am kṣetra-jña. My body is kṣetra, the field of activities, and your body is the field of activities.