Hare Krishna....

Hare Krishna .... in The Bhagavad Gita, 4, 42 at the end of the meaning Srila Prabhupada says that a genuine spiritual master is in disciplic succession from eternal time, and does not depart at all from the instructions of the Supreme Lord, such as they were given millions of years ago to the sun god, from whom the instructions of the Bhagavad-gītā have descended into the earthly kingdom.
Do you know what this means?
Haripada dasa