This is the study of the whole structure. Grossly, our body means the senses. We are, everyone, animal and less intelligent men, they are busy only for sense gratification. Indriyāṇi parāṇ . . . they think the sense gratification, "This is enjoyment, this is happiness." But actually that is not happiness. Sukham ātyantikaṁ yat tad atīndriyam (BG 6.21). What is actual happiness, ātyantikam, that is atīndriya. Atīndriya means beyond the senses. But because we have no such knowledge, because we are in the bodily concept of life, "I am this body," so I am interested in the matter of gratifying my senses. Indriyāṇi parāṇy āhuḥ. Those who are little advance, they are in the enjoyment of the mind, mental speculation, philosophy or theosophy. So many "sophies" are there—somebody putting some theories, this theory, that theory, that theory. Mental speculation. They derives poetry, writing poetry, nice poetry. They are not on the gross platform of sense gratification but on the subtle platform of sense . . . mind is also sense. Mind is also sense.
Kṛṣṇa says in the Bhagavad-gītā, bhūmir āpo 'nalo vāyuḥ khaṁ mano buddhir eva ca, bhinnā me prakṛtir aṣṭadhā (BG 7.4): "These eight elements, they are also My prakṛti, but bhinnā, separated, separated prakṛti." Prakṛti means subordinate to the puruṣa. As soon as the prakṛti . . . generally, we understand that the husband and wife, wife is called prakṛti, and the husband is called puruṣa. So puruṣa means enjoyer, and prakṛti means enjoyed. So similarly, when Kṛṣṇa says, bhinnā me prakṛtir aṣṭadhā, that all these elements, gross and subtle—earth, water, air, fire, and these are gross elements, and the mind, intelligence and ego, subtle elements . . . then Kṛṣṇa says, apareyam, "These elements are inferior prakṛti." Apareyam itas tu viddhi me prakṛtiṁ parām. There is another prakṛti. What is that? Jīva-bhūtāṁ mahā-bāho yayedaṁ dhāryate jagat (BG 7.5). Jīva-bhūta, the living entity.
The living entity is also prakṛti. We are not puruṣa. But we forget this. Prakṛti means to be used by the puruṣa. Therefore our position is, real position is, we should be used by the Supreme Personality of Godhead, puruṣa, Puruṣottama. This is our position. But artificially we are trying to become the puruṣa. That is māyā. Instead of being utilized by the puruṣa, we are trying to become the puruṣa, to utilize the material nature. Yayedaṁ dhāryate jagat. The world is going on, the material world, because the living entities in the attitude of becoming puruṣa, they are trying to exploit the resources of this material nature. This is going on. (aside) You sit down, you people, on the chair.
So this is our material disease. And how we are trying to be master or enjoyer of this material world? By the senses, by the mind. Manaḥ ṣaṣṭhāni prakṛti-sthāni karṣati. Manaḥ . . . mamaivāṁśo jīva-bhūtaḥ (BG 15.7). "The living entities," Kṛṣṇa says, "they are My part and parcel." So instead of serving Kṛṣṇa, they are trying to . . . utilizing, they are trying to utilize the material nature for their sense gratification. This is called struggle for existence, prakṛti-sthāni karṣati. Karṣati means hard struggle. Manaḥ-ṣaṣṭhānīndriyāṇi prakṛti-sthāni karṣati (BG 15.7). This is going on. And this karṣati means struggling for existence. Because he cannot be happy. He cannot be happy by this artificial way of life. This is artificial way of life. Just like both of them have been described as prakṛti. Bhinnā me prakṛtir aṣṭadhā. And apareyam itas tu viddhi me prakṛtiṁ parām. The parā, it is prakṛti. Suppose there are two prakṛtis, two women. One has dressed as man and one has dressed as woman. But how they can enjoy? Because actually they are prakṛtis. Simply by changing the dress, there is no possibility of enjoyment. Prakṛti. Therefore, manaḥ-ṣaṣṭh . . . it is simply mental concoction. Manaḥ-ṣaṣṭhānīndriyāṇi prakṛti-sthāni karṣati (BG 15.7). This is going on.