Krishna's teaching opens with a precise diagnosis. You grieve for those who are not worth grieving for, he tells Arjuna, and yet you speak like a wise man. The truly wise do not grieve — not for the dead, not for the living. This is not cold-heartedness. It is clarity about what is real and what is temporary.
The sting in Krishna's words comes from that phrase 'prajnavadamsh cha bhashase' — you speak words that sound wise. Arjuna's arguments in Chapter 1 were eloquent, well-reasoned, full of references to dharma and tradition. But Krishna says: your words sound learned, while your actions show confusion. Wisdom is not in the speech alone — it is in understanding.
What does it mean to not grieve for the living or the dead? Krishna will spend the next several shlokas explaining. The core idea: the soul is eternal. Bodies come and go, but the being within is neither born nor destroyed. Once this is truly understood — not just intellectually, but deeply — grief for physical death loses its grip.