From the seven hundred
अशोच्यानन्वशोचस्त्वं प्रज्ञावादांश्च भाषसेगतासूनगतासूंश्च नानुशोचन्ति पण्डिताः
aśocyān anvaśocas tvaṃ prajñā-vādāṃś ca bhāṣase gatāsūn agatāsūṃś ca nānuśocanti paṇḍitāḥ

“You grieve for those who need no grief, and yet you speak as the wise do. The wise grieve for neither the living nor the dead.”

Bhagavad Gita 2.11
In plain terms

Krishna's first teaching lands like cold water. Arjuna's grief, he says, is aimed at what can never really be lost, and wisdom means learning where loss can actually reach.

It sounds severe until the next verses widen the view. What follows is comfort of a deeper kind: a patient case that the essential part of every person is beyond harm.

All the verses, by the moment you need them