Chapter 4: Verse-1
At the present moment we have just passed through five thousand years of the Kali-yuga, which lasts 432,000 years. Before this there was Dväpara-yuga (800,000 years), and before that there was Tretä-yuga (1,200,000 years). Thus, some 2,005,000 years ago, Manu spoke the Bhagavad-gita to his disciple and son Mahäräja Iksväku, the king of this planet earth. The age of the current Manu is calculated to last some 305,300,000 years, of which 120,400,000 have passed. Accepting that before the birth of Manu the Git ä was spoken by the Lord to His disciple the sun-god Vivasvän, a rough estimate is that the Gita was spoken at least 120,400,000 years ago; and in human society it has been extant for two million years. It was respoken by the Lord again to Arjuna about five thousand years ago. That is the rough estimate of the history of the Gita, according to the Gita itself and according to the version of the speaker, Lord Krsna. It was spoken to the sun-god Vivasvän because he is also a ksatriya and is the father of all ksatriyas who are descendants of the sun-god, or the sürya-vamsa ksatriyas. Because Bhagavad-gita is as good as the Vedas, being spoken by the Supreme Personality of Godhead, this knowledge is apauruseya, superhuman. Since the Vedic instructions are accepted as they are, without human interpretation, the Gita must therefore be accepted without mundane interpretation. The mundane wranglers may speculate on the Gita in their own ways, but that is not Bhagavad-gita as it is. Therefore, Bhagavad-gita has to be accepted as it is, from the disciplic succession, and it is described herein that the Lord spoke to the sun-god, the sun-god spoke to his son Manu and Manu spoke to his son Iksväku.