When Lord Krishna says, "Arjuna, just as I am teaching you the inner knowledge of Aathma, I taught it to the Sun, the Sun to Manu, Manu to Ishwaku, means: Arjuna I am unborn, I am infinite, I am omniscient and omnipresent, I have neither beginning nor an end". He is the eternal Saarathi of mankind.

In Chapter 4 verse 1 it is explained that this science was available as it was explained at the time of starting of universe. ( " I told to Sun and Sun told to Manu etc) It is also certified in Chapter 2 verse 28 . ( All human beings before birth are without human body and after death shall also be without human body).This is known as Tatwa theory or theory of life. Some how all this is explained along with control on mind, desires, pride ( Ahenkar ), and brainpower.I can conclude that all this is required. As it is well known that no scientist can create or discover without control on mind. Scientists are working for the society. Control on mind, desires , intelligence (Budhi) are the key factors or qualifications of scientists. This is the reason importance is given to control on Indriyan or Desires or Mind or Budhi ( Intelligence ).

It means that knowledge is present from times immemorial and it is revealed and passed on to next generation.

When Lord Krishna says, "Arjuna, just as I am teaching you the inner knowledge of Aathma, I taught it to the Sun, the Sun to Manu, Manu to Ishwaku, means: Arjuna I am unborn, I am infinite, I am omniscient and omnipresent, I have neither beginning nor an end". He is the eternal Saarathi of mankind.

When Lord Krishna says, "Arjuna, just as I am teaching you the inner knowledge of Aathma, I taught it to the Sun, the Sun to Manu, Manu to Ishwaku, means: Arjuna I am unborn, I am infinite, I am omniscient and omnipresent, I have neither beginning nor an end". He is the eternal Saarathi of mankind.