PURPORT

In the Fourth Chapter of Bhagavad-gita Lord Krsna affirms that formerly (some 120 million years before the Battle of Kuruksetra) He explained the mystic philosophy of the Gita to the sun-god. The message was received through the chain of disciplic succession, but in course of time, the chain being broken somehow or other, Lord Sri Krsna appeared again and taught Arjuna the truths of Bhagavad-gita. At that time the Lord spoke this verse (4.11) to His friend Arjuna.