Prabhupāda: When one understands Kṛṣṇa in truth, then he's allowed to enter; otherwise, he cannot enter. He remains outside. Just like if we have got capacity to enter into the sun planet then we can enter. Otherwise we remain in the sunshine. To remain in the sunshine and to enter into the sun planet is not the same thing. Although the sun and the sunshine are light, illumination, still there is difference between the sun and the sunshine. Similarly, impersonal Brahman effulgence and Vaikuṇṭha planets, both of them, absolute, but still Brahman effulgence and entering into the Vaikuṇṭha planets or Goloka Vṛndāvana planets are not the same. Or, in other words, those are not, those who are not devotees, but impersonalists, they can stay outside the Vaikuṇṭha planets in the Brahman effulgence, but they cannot enter into the Vaikuṇṭha planets. Anādṛta-yuṣmad-aṅghrayaḥ. Because they have not adored or glorified the lotus feet of the Lord, they are not allowed into the Goloka Vṛndāvana or Vaikuṇṭha planet. And they cannot remain perpetually in the impersonal Brahman effulgence. They come down again to these material varieties. Āruhya kṛcchreṇa paraṁ padaṁ tataḥ patanty adhaḥ (SB 10.2.32). They cannot go upwards. They come, come down. That we have practically seen. All big, big swamis, all Vedantists, but they could not find. Even big, big swamis, they are now taking to Bhāgavata and other Vaiṣṇava literature at the present moment. Because their own literature is finished. How long they'll simply call for Brahman? Unless they come to Kṛṣṇa, there is no varieties of enjoyment. Therefore here it is said that "There is no..." Go on. What is it?
Pradyumna: "There is no preventing one's falling down from material happiness, and there is every chance of falling down from the spiritual happiness derived out of identifying oneself with the impersonal Brahman."
Prabhupāda: Every chance of falling down from the spiritual happiness. That spiritual happiness, nirbheda-brahmānu-sandhana. Nirbheda, without any distinction. That is not real Brahman happiness. Brahman happiness means that there must be a distinction. The distinction means Kṛṣṇa is predominator and everyone is predominated. Just like the gopīs. Kṛṣṇa is the predominator, and the gopīs and all the inhabitants of Vṛndāvana-Nanda Mahārāja, Yaśodā and the cowherd boys, servant, trees, plants, flowers, water, animals, cows—everyone is predominated. Kṛṣṇa is only predominator. That is real happiness. Whenever there is any trouble in Vṛndāvana, they approach the predominator and immediately the predominator takes care and they're happy. This is Vṛndāvana life. As soon as there was torrents of rain, the, all the inhabitants, inhabitants of Vṛndāvana, they approached Kṛṣṇa to give them protection. And Kṛṣṇa immediately gave them protection by lifting Govardhana Hill. So they were confident that Kṛṣṇa's there. They did not know Kṛṣṇa as God. They simply loved Kṛṣṇa, and they were confident that "So long Kṛṣṇa is there, we are happy, we are out of danger." That is the conviction of the Vṛndāvana-vāsī. They simply concentrate on Kṛṣṇa.