Long, long ago, prehistoric age practically . . . because the modern history cannot give account of the world more than three thousand years. But about five thousand years ago a meeting was held at Naimiṣāraṇya. Naimiṣāraṇya is a place in India still existing. Perhaps some of you who might have visited India . . .
This place is situated near Lucknow in the northern India provinces, a very nice place, sanctified place. Still people go and find peace for spiritual meditation. In that tract of land, Naimiṣāraṇya, from time immemorial this place was especially recognized for spiritual meeting. So there was a meeting of great saintly persons, and Sūta Gosvāmī, one of the disciples of Śukadeva Gosvāmī, he was selected the president to speak on Kṛṣṇa consciousness.
So the question from the saintly persons—there were many questions—one of the question was that, "After departure of Kṛṣṇa, who is in trust of dharma and jñāna?" Dharma means religion, and jñāna means knowledge. Because Kṛṣṇa, when He appeared on this planet, He said that:
- paritrāṇāya sādhūnāṁ
- vināśāya ca duṣkṛtām
- dharma-saṁsthāpanārthāya
- sambhavāmi yuge yuge
- (BG 4.8)
"I appear in every millennium." According to Vedic scripture, Kṛṣṇa appears on this planet in one day of Brahmā. And Brahmā's duration of life is described in the Bhagavad-gītā. It is a very, very long period. His one day, daytime, twelve hours, from morning to evening, is described, sahasra-yuga-paryantam arhad yad brahmaṇo viduḥ (BG 8.17). Sahasra-yuga. Yuga, this age. Just like this is, according to Vedic culture, this yuga is called Kali-yuga.
So there are four yugas: Satya-yuga, Tretā-yuga, Dvāpara-yuga and Kali-yuga. So the aggregate of all these yugas is about forty-three hundred thousands of years. And if you multiply by one thousand, then that becomes Brahmā's one day only, twelve hours. Sahasra-yuga-paryantam arhad yad brahmaṇo viduḥ. So similarly, he has got one night also, and similarly, one day and night, then one month, then one year. In this way he lives for one hundred years. So during this period of daytime, Kṛṣṇa appears once. That we learn from the Vedic literature.