Devotional service is not an activity of the material world; it is directly under the control of Rādhārāṇī
The Nectar of Devotion -- Vrndavana, November 11, 1972:
Pradyumna: "To perform devotional service means to follow in the footsteps of Rādhārāṇī, and devotees in Vṛndāvana put themselves under the care of Rādhārāṇī in order to achieve perfection in their devotional service. In other words, devotional service is not an activity of the material world; it is directly under the control of Rādhārāṇī. In the Bhagavad-gītā it is confirmed that the mahātmās, or great souls, are under the protection of daivī prakṛti, the internal energy—Rādhārāṇī. So, being directly under the control of the internal potency of Kṛṣṇa, devotional service attracts even Kṛṣṇa Himself."
Prabhupāda: Yes. Mahātmānas tu māṁ pārtha daivīṁ prakṛtim āśritāḥ, bhajanty ananya-manaso [Bg. 9.13]. Here we are under the influence of this material energy, but those who are devotee of Kṛṣṇa, they are under the influence of internal energy. The internal energy of Kṛṣṇa, it has got three different functions. One of the function is hlādinī śakti. That is Rādhārāṇī. That is Rādhārāṇī.
- Rādhārāṇī is the pleasure potency of Kṛṣṇa.
- rādhā kṛṣṇa-praṇaya-vikṛtir hlādinī śaktir asmād
- ekātmānāv api (bhuvi purā) deha-bhedaṁ gatau tau
- śrī-caitanyākhyaṁ prakaṭam adhunā tad-dvayaṁ caikyam āptam...
- [Cc. Ādi 1.5]
Rādhā-kṛṣṇa..., that Caitanya Mahāprabhu is... That is the version of Śrī Svarūpa Dāmodara, that "Rādhā and Kṛṣṇa, They are one, Kṛṣṇa." When Kṛṣṇa wants to enjoy, He manifests His energy. That is Rādhārāṇī. Kṛṣṇa cannot enjoy the material energy; He enjoys the internal energy. Kṛṣṇa has got many energies. Parāsya śaktir vividhaiva śrūyate, svābhāvakī-jñāna-bala-kriyā ca [Cc. Madhya 13.65, purport]. That is the Vedic version, that the Supreme Absolute Truth has got multi-energies, and by utilizing, manipulating that energy, He is manifesting Himself in so many ways. The same example: just like the sun, by expanding its energy, heat and light, is perceived. The sun is ninety-three million miles away from us. So how we can understand the sun? By his heat and energy. By his heat, we can calculate what is the actual temperature. The scientists are calculating the actual temperature of the sun. So similarly, although Kṛṣṇa is far, far away from us... Goloka eva nivasati. He's residing in His abode, Goloka, Vṛndāvana. This is the replica of that Vṛndāvana. So akhilātma-bhūtaḥ. How He's akhilātma-bhūtaḥ [Bs. 5.37]? How He's all-pervading? By His energy. By His energy. Just like Kṛṣṇa says in the Bhagavad-gītā: mayā tatam idaṁ sarvaṁ jagat avyakta-mūrtinā [Bg. 9.4]. That energy is avyakta, impersonal. But Kṛṣṇa is not impersonal. Kṛṣṇa is person. Just like the sun-god, he's a person, but his energy, sunshine and heat, that is impersonal. To reach impersonal feature of the sun or the sunshine is not approaching the sun. It is approaching and not approaching. It is approaching in the sense that directly in touch with his energy, but still, the sun globe and the sun-god is far away. Similarly, brahmeti paramātmeti bhagavān iti śabdyate [SB 1.2.11]. To approach the impersonal feature of Brahman is not sufficient. We have to approach Kṛṣṇa. So the Rādhārāṇī, the personal,... His energy's also personal. So mahātmānas tu māṁ pārtha daivīṁ prakṛtim āśritāḥ [Bg. 9.13]. If we take shelter of His external energy, where forgetfulness, Kṛṣṇa, is very prominent, then we become far and far away from Kṛṣṇa. But if we take shelter of the internal energy of Kṛṣṇa, Rādhārāṇī, because She's directly serving Kṛṣṇa... Just like in Vṛndāvana, they always speak of Rādhārāṇī because they have taken shelter of Rādhārāṇī to approach Kṛṣṇa very easily. Daivīṁ prakṛtim āśritāḥ. The facility of Vṛndāvana is that you take shelter of Rādhārāṇī directly and She will help you to approach Kṛṣṇa very soon. This is the idea of coming to Vṛndāvana.