So here Kṛṣṇa came, and this incident took place after disappearance of Kṛṣṇa. Kali-yuga entered after disappearance of Kṛṣṇa. Parīkṣit Mahārāja was also very vigilant. The Pāṇḍavas, they left their kingdom because they could understand that Kali-yuga has already entered. So bhūri-bharāvatāra-kṛtāvatārasya. Bhūri-bhara, when people become too much sinful, the earth becomes overburdened by the sinful activities of the people. Therefore it is called bhūri-bharavatāra. And Kṛṣṇa comes to mitigate. Dharmasya glānir bhavati bhārata, tadātmānaṁ sṛjāmy aham. Kṛtāvatārasya harer dharitri. This is the purpose of avatāra. Avatāra, this word is very significant. The tara, tara means movement; and ava, ava means down. Just like avanati. So avatāra. Kṛṣṇa lives in the spiritual sky, beyond this material sky, very high, and Kṛṣṇa-loka, the planet of Kṛṣṇa, is the topmost planet in the spiritual world. That is stated in the Brahma-saṁhitā, goloka-nāmni nija-dhāmni tale ca tasya (Bs. 5.43). The topmost planet is Goloka, Goloka Vṛndāvana planet. You have seen the picture. It is lotuslike. So goloka-nāmni nija-dhāmni: "That is His personal abode." Tale ca tasya, "below that," goloka-nāmni nija-dhāmni tale ca tasya (Bs. 5.43), "below that planet," goloka-nāmni nija-dhāmni tale ca tasya devī-maheśa-hari-dhāmasu. Devī. This universe, this material universe, is called devī-dhāma. Devī-dhāma means under the protection, or supervision, of mother nature. That is called devī-dhāma, material nature. So goloka-dhāmni nija-dhāmni tale ca tasya devī, devī-dhāma.
This material world is devī-dhāma, under the... You have seen the picture of Durgā. So material nature is also devī, devī-dhāma. And maheśa-dhāma. Above this, there is maheśa-dhāma, the region of Lord Śiva. Devī-maheśa-hari-dhāmasu. Then the Vaikuṇṭhas. And the topmost is kṛṣṇa-dhāma. That dhāma, or that universal system, that is very, very big, many times. This material universe is considered one fourth creation. It is one... Ekāṁśena sthito jagat (B.G.10:42). In the Bhagavad-gītā it is said, "This material world is one fourth creation of God." And the three-fourth creation is the spiritual world. Just imagine. This material world, this universe, which you are seeing, the big sky, dome, this is one universe. That is also stated. We get all this information from Vedic literature. This universe is only one single universe, and there are so many planets, stars. These are all stated in the Brahma-saṁhitā.
(Lecture on Srimad Bhagavatam----1:16:23).