You grieve for those who are not worth grieving for, yet you speak words that sound like wisdom. The wise do not grieve for the dead or for the living.
Explanation
Krishna begins his teaching to Arjuna, who has sunk into despair between the two armies. He gently points out that Arjuna's grief contradicts the wise-sounding arguments he has just made about duty and family. The wise (paṇḍitāḥ) see what is lasting in a person and so do not mourn, whether someone has died or is still alive. Commentators differ on whether "not worth grieving" points mainly to the imperishable self (ātman) or to the duty at hand, and the next verse develops the first reading.