विहाय कामान्यः सर्वान्पुमांश्चरति निःस्पृहः।निर्ममो निरहंकारः स शांतिमधिगच्छति॥
vihāya kāmān yaḥ sarvān pumānś carati niḥspṛhaḥnirmamo nirahankāraḥ sa śāntim adhigacchati
Word by word
The verse says
The person who gives up wanting and goes about without craving, without "mine", without "I am the one" - that person comes to peace.
In plain words
Three things dropped, and the last two are the deep ones.
Niḥspṛha - no craving. Nirmama - no mine. Nirahaṅkāra - no I am the one doing this.
That middle word is the one that answers Chapter 1.
Where you've felt this · in creative work
You hand over the system you built and watch someone else rip out half of it. There is a version of you that would have found that unbearable. You notice, mildly, that you have no stake in it any more.
Going deeper
Nirmama - without mine. Trace that word back to where this book started.
Dhritarashtra's very first word in Chapter 1 was my men, and it split one family into two armies. Duryodhana said my army. Arjuna collapsed over my own people. The whole first chapter runs on possessive pronouns.
So when Krishna names being without-mine as a condition of peace, he is not introducing a new idea at the end of a chapter. He is closing a circuit that was opened in the book's opening line.
Then ahaṅkāra - literally the I-maker, the faculty that stamps ownership onto an action. This is what was crushing Arjuna. Not the deaths themselves, but being the one whose hand it would be.
And notice the verse keeps the person moving. Carati - he goes about, he lives. Nothing here describes withdrawal from life. What has been removed is not the activity but the machinery that claims it.