Udīcīṁ praviveśa. So one who goes to the northern side, it is to be understood he never comes back. Northern side means the Arctic zone, covered with snow. So this was known in Bhāgavata age. Not only in Bhāgavata age; some, about thousand years ago also, there is Kālidāsa's book, Kumāra-sambhava. Kumāra-sambhava, "The Birth of Kārttikeya." So in that book, the beginning is, asty uttarasyaṁ diśi himālayo nāma nagadhirājaḥ. Uttarasyaṁ diśi, in the northern side, there is mountain which is covered with snow, Himalaya. Hima means ice. Hima.
Asty uttarasyaṁ diśi himālayo nāma nagadhirājaḥ: "In the northern side, there is a hill, or a mountain, which is always covered by snow." Although the . . . at the present moment, Himalaya, there is one mountain that is also called Himalaya, Mount Everest, but I think this Arctic zone was referred. Because it is said there that, "Touching both sides water." Asty uttarasyaṁ diśi himālayo nāma nagadhirājaḥ, toya-nidhi avagāhya. Toya-nidhi. Toya-nidhi means oceans, both side ocean, the Pacific Ocean and the Atlantic Ocean. Avagāhya, touching. So the Arctic zone was referred in many books, Vedic literature. It is not that it was unknown. Everything was known. The modern historians, they say like that. They say the Bhāgavata was written about 1,500 years ago. No. Five thousand years ago. They bring everything within the Christian era. Before that, there was no history, according to them. But that is not the fact.
Anyway, Mahārāja Yudhiṣṭhira went to the northern side. Gata-pūrvāṁ mahātmabhiḥ. His forefathers, they were also mahātmās. Formerly the kings were not, I mean to say, licentious drunkards. They were all ṛṣi, as good as great saintly person, rājarṣi. Therefore Bhagavad-gītā was taught to the saintly kings. The modern people, they say that, "Why not this movement amongst the poorer class men?" They do not know who is poor. Anyone who is poor in spiritual understanding, he is poor. By material opulence, one does not become rich. He is animal. By material opulence, one may be polished animal, but he is an animal. One who is spiritually advanced, he is actually in knowledge. Because basic principle is spirit. Without spiritual knowledge, anything, any so-called knowledge, advancement of knowledge, is simply mistake, mistake. Just like if you, in calculating one mathematical sum, if you commit mistake anywhere, the whole thing is spoiled. Whole thing is spoiled. You go on, you are making progress, but real mistake was there; it will never carry. The balance, it will not come into being.