Speaker:  Srila Prabhupada
Source: We Are Controlled

When Arjuna asked Krsna, Krsna said, imam vivasvate yogam proktavan aham avyayam (BG. 4.1). Krsna said that, “First of all, I narrated this yoga system of Bhagavad-gita to the sun-god.” So, in order to clear this matter, Arjuna inquired from Him: “My dear Krsna, we are born very recently. How is that You narrated this yoga system to the sun-god?” Arjuna, of course, knew everything, but in order to clear our doubts, he raised this question. And Krsna answered that “You were also present at that time, but you have forgotten.