Krishna's First Lesson - Prabhupada 0120
730411 - Lecture BG 02.13 - New York
Therefore the first instruction of Kṛṣṇa to Arjuna . . . because if Arjuna would not have been in that position of illusion that, "I am this body, and the other side—my brother, my grandfather, my nephews—they're all my relations. How can I kill?" This is the illusion. Therefore to dissipate this illusion, darkness, Kṛṣṇa begins the first lesson, that "You are not this body."