One should approach guru for seeing the tattva, the Absolute Truth. That is necessary. Not for any material benefit. One should not search out a guru for, I mean to say, curing some material disease. For that, there is medical practitioner. Why should you search out after a guru? But people search out that, "I have got some material disease, and if somebody can cure, some saintly person, then he's guru or he's Bhagavān. I am poor. If he can give me some money, then he's guru." No. The śāstra does not say like that. Guru means śrotriyaṁ brahma-niṣṭham (MU 1.2.12). Tasmād guruṁ prapadyeta jijñāsuḥ śreya uttamam, śābde pare ca niṣṇātam (SB 11.3.21). Guru means who knows the Vedic śāstra, the Vedas. He knows the Vedic conclusion. And the Vedic conclusion is to understand Kṛṣṇa. That is Vedic conclusion. Vedaiś ca sarvair aham eva vedyam (BG 15.15).
Therefore those who are trying to understand Kṛṣṇa, or partially . . . we cannot understand fully Kṛṣṇa. That is not possible. We have not so capacity. Because Kṛṣṇa is so big. Advaita acyuta anādi ananta (Bs. 5.33). So with our limited knowledge we cannot understand . . . even Kṛṣṇa does not understand Himself, Kṛṣṇa is so great. Kṛṣṇa Himself, He does not know why He's so much attractive. Therefore, to understand this knowledge, why Kṛṣṇa is so attractive, He became Lord Caitanya, taking the ecstatic emotion of Śrīmatī Rādhārāṇī. Rādhā-bhāva-dyuti (CC Adi 1.5). That's a very great science. Kṛṣṇa is such that Kṛṣṇa . . . of course, it is our calculation that Kṛṣṇa does not understand Himself. So to understand fully Kṛṣṇa, it is not possible. But as far as our limited knowledge is concerned, if we understand Kṛṣṇa so much, that is our perfection. That is our perfection. Therefore Kṛṣṇa says, janma karma me divyaṁ yo jānāti tattvataḥ (BG 4.9).
So if we understand Kṛṣṇa as a human being like us, avajānanti māṁ mūḍhāḥ (BG 9.11), then we are mūḍhas. "Kṛṣṇa is also . . . Kṛṣṇa's body is made of these māyā elements, or external elements, like us," just like our body is made of these material elements. If we think Kṛṣṇa also made of that elements, of these material elements, kṣitir āpo 'nalo vāyuḥ, then we are mistaken. Kṛṣṇa is . . . here, in the previous verse, we have learned: ātma-māyayā. There are . . . of course, this material energy is also ātma-māyā, Kṛṣṇa's. Not ours. Mama māyā. Kṛṣṇa says, mama māyā. Daivī hy eṣā guṇamayī mama māyā (BG 7.14). This material world is Kṛṣṇa's. We cannot say mama māyā. No. We are under the control of this material nature. But Kṛṣṇa is the controller of the material nature. That is the difference. We are controlled by the material nature, but Kṛṣṇa is not controlled, but He's controller. Mayādhyakṣeṇa prakṛtiḥ sūyate sa-carācaram (BG 9.10).
One who understands this, that this prakṛti, this material nature, is working under the direction of Kṛṣṇa, that is our real knowledge. How the things are going on? That is not possible to understand. But the summary, sum total, if we simply understand . . . janmādy asya yataḥ (SB 1.1.1). Everything is emanated from the Supreme Absolute Truth, Kṛṣṇa. That much knowledge is sufficient. Then you can increase—how they are working. How, by Kṛṣṇa's energies, the material energy is working by the direction of Kṛṣṇa, that is advanced knowledge. But on the whole, if we . . . as it is stated in the Bhagavad-gītā, mayādhyakṣeṇa prakṛtiḥ sūyate sa-carācaram. That is perfect knowledge. If we think that this matter is working independently, as modern scientists, they think that chemical evolution . . . no. No chemical evolution. Life does not produce by chemical evolution. Life is from life. That . . . just like Kṛṣṇa says in the Bhagavad-gītā, that ahaṁ sarvatra . . . ahaṁ sarvasya prabhavo mattaḥ sarvaṁ pravartate (BG 10.8). The answer is given there. The Vedānta-sūtra, the question is, "What is Brahman?" And the answer is there: athāto brahma jijñāsā, janmādy asya yataḥ. Indirectly given. The Brahman, Para-brahman, is that from whom everything emanates.