So this science was spoken first of all to Vivasvān, the sun-god. He spoke to his son Manu, and Manu spoke to his son Ikṣvāku. And in the second verse, the Lord says, evaṁ paramparā-prāptam: "In this way, by disciplic succession," evaṁ paramparā-prāptam. That means the process of understanding this particular type of yoga—any yoga or this yoga—is to understand from disciplic succession. Paramparā. Evaṁ paramparā-prāptam imaṁ rājarṣayo viduḥ (BG 4.2). Rājarṣayaḥ means all the names mentioned here, either Vivasvān or Manu or Ikṣvāku. They were all great emperors and kings. Formerly the emperors and kings were familywise. Just like... At least, in England you have got the king by familywise. In every country it was... Now monarchy is abolished. So these kṣatriyas, they were qualified. There was no question of democracy. At the present moment, by democracy if somebody can some way or other acquire some votes he becomes the chief man, but formerly the practice was that a qualified man who is trained, a king, he was on the seat. They were called rājarṣi. Rājarṣi means practically they were sages. Just like Mahārāja Janaka. There were many kings, ideal kings. Mahārāja Yudhiṣṭhira, Mahārāja Rāmacandra. Many kings. Even Mahārāja Parīkṣit, five thousand years before he was so responsible king that when he was on tour he saw that one cow was being attempted to be killed, and the cow was crying. At once the king stopped, "Who are you? In my kingdom a cow is crying? I shall immediately kill you." So the king was so responsible that even animal was not allowed to be dissatisfied, what to speak of man. So they were so responsible. Therefore they were called rājarṣi. Rājarṣi. And it is particularly, everything, knowledge is meant for high class of men. Low class of men, what they will understand?
So this Bhagavad-gītā was spoken to the rājarṣis, the great kings who were just like saints and sages. They were on the throne, but they were all, I mean to say, dedicated souls for the peace and prosperity of the people.