When our aim of life will be to understand our relationship with Viṣṇu . . . na te viduḥ. But we do not know it. We are so much captivated by the external energy, māyā, that the whole program is how to forget Viṣṇu, the Supreme Personality of Godhead. But our real aim of life is to know our relationship with the Supreme Personality of Godhead, Viṣṇu. Na te viduḥ svārtha-gatiṁ hi viṣṇuṁ durāśayā (SB 7.5.31). They are trying to become happy within this material world. Durāśayā ye bahir artha-māninaḥ. Bahiḥ, bahiḥ means external energy. God has got parasya śaktir vividhaiva śrūyate (Śvetāśvatara Upaniṣad 6.8, CC Madhya 13.65, purport). He has got multi-energies. All these multi-energies have been grossly divided into three: the external energy, the internal energy and the marginal energy. So we living entities, we are the marginal energy. Marginal means between the two, spiritual energy and material energy.
At the present moment, those who are in this material world, we are under the influence of material energy. But we can get out of this material energy by bhagavad-bhakti. Mām eva ye prapadyante māyām etān taranti te. By our surrendering to the Supreme Personality of Godhead, Kṛṣṇa, we can get out of these clutches of external energy and again become under the internal energy. Mahātmānas tu māṁ pārtha daivī prakṛtim āśritāḥ (BG 9.13). Now we are under the influence of mahāmāyā. When we put ourselves under the influence of yogamāyā, then we again go back to home, back to Godhead.
So this is a great science, and Vedic literature profusely has described this science, how to get out of these clutches of external energy. That is Kṛṣṇa says in the next verse: ṛṣibhir bahudhā gītam. Ṛṣibhiḥ, not ordinary persons; rsi, great . . . just like Vyāsadeva. Mahārṣi, devarṣi, rājarṣi, ṛṣi. Formerly the brāhmaṇas, they were ṛṣis, and the kṣatriyas also, they were also just like ṛṣis. Therefore they are called rājarṣi. The spiritual science is not understandable by ordinary men. Just like Kṛṣṇa says in the Fourth Chapter, imaṁ rājarṣayo viduḥ: "This science was understood by the great rājarṣi." Just like Mahārāja Yudhisthira, rājarṣi; Lord Rāmacandra, rājarṣi; Mahārāja Parīkṣit, rājarṣi; Mahārāja Ikṣvāku, rājarṣi. There are many. They were rājarṣis. The monarchy was not a cheap thing. The king was as good as a ṛṣi. Therefore they are called rājarṣi. The king used to rule over the citizens on the permission of the great, great sages. Just like Nārada, the devarṣi. He used to visit Mahārāja Yudhisthira. Similarly, other kings.