Five Hidden Treasures Of The Bhagavad-gita

“Sanjaya was a student of Vyasa, and therefore, by the mercy of Vyasa, Sanjaya was able to envision the Battlefield of Kurukshetra even while he was in the room of Dhritarashtra. And so, Dhritarashtra asked him about the situation on the battlefield.” (Shrila Prabhupada, Bhagavad-gita, 1.1 Purport)