Releasing Nanda Mahārāja from the Clutches of Varuṇa 187
Brahmaloka where Lord Brahmā lives, and among these demigods there are always different gradations of knowledge. But past this material world, in the Vaikuṇṭha sky, everyone is in full knowledge. All the living entities there are engaged in devotional service to the Lord, either in the Vaikuṇṭha planets or in Kṛṣṇaloka.
As it is confirmed in the  Bhagavad-gītā , full knowledge means knowing Kṛṣṇa to be the Supreme Personality of Godhead. In the  Vedas  and  Bhagavad-gītā  it is also stated that in the  brahmajyoti  or spiritual sky there is no need of sunlight, moonlight, or electricity. All those planets are self-illuminating, and all of them are eternally situated. There is no question of creation and annihilation in the  brahmajyoti , spiritual sky.  Bhagavad-gītā  also confirms that beyond the material sky there is another eternal spiritual sky where everything is eternally existing. Information of the spiritual sky can be had only from great sages and saintly persons who have already surpassed the influence of the three material modes of nature. Unless one is constantly situated on that transcendental platform, it is not possible to understand the spiritual nature.
Therefore it is recommended that one should take to  bhakti-yoga  and keep himself engaged twenty-four hours in Kṛṣṇa consciousness, which places one beyond the reach of the modes of material nature. One in Kṛṣṇa consciousness can easily understand the nature of the spiritual sky and Vaikuṇṭhaloka. The inhabitants of Vṛndāvana, being always engaged in Kṛṣṇa consciousness, could therefore very easily understand the transcendental nature of the Vaikuṇṭhalokas.
Thus Kṛṣṇa led all the cowherd men, headed by Nanda Mahārāja, to the lake where Akrūra was later shown the Vaikuṇṭha planetary system. They took their bath immediately and saw the real nature of the Vaikuṇṭhalokas. After seeing the spiritual sky and the Vaikuṇṭhalokas, all the men, headed by Nanda Mahārāja, felt wonderfully blissful, and coming out of the river, they saw Kṛṣṇa, who was being worshiped with excellent prayers.
Thus ends the Bhaktivedanta purport of the Twenty-eighth Chapter of Kṛṣṇa, "Releasing Nanda Mahārāja from the Clutches of Varuṇa."