Krishna speaks10.38

दण्डो दमयतामस्मि नीतिरस्मि जिगीषताम्।मौनं चैवास्मि गुह्यानां ज्ञानं ज्ञानवतामहम्॥

daṇḍo damayatām asmi nītir asmi jigīṣatāmmaunaṃ caivāsmi guhyānāṃ jñānaṃ jñānavatām aham

Word by word
daṇḍaḥ — punishmentdamayatām — amongst means of preventing lawlessnessasmi — I amnītiḥ — proper conductasmi — I amjigīṣatām — amongst those who seek victorymaunam — silenceca — andeva — alsoasmi — I amguhyānām — amongst secretsjñānam — wisdomjñāna-vatām — in the wiseaham — I

The verse says

Among ways of restraining I am the rod. Among those who seek to win, I am good judgement. Among secrets I am silence — and in the wise, I am wisdom.

In plain words

Maunam — silence, named as the chief of secrets.

The best-kept secret is not a hidden fact. It is the thing nobody says.

And beside it, among those trying to win, not force but judgement.

Where you've felt this · at work

A manager watches somebody make a mistake in a meeting and says nothing at the time. She mentions it the next day, in the corridor, in one sentence. Saying it in the room would have been faster and would have cost the person something in front of nine colleagues, for no gain she could name.

Going deeper

Silence being named as the foremost of secrets is a pun that is also a definition.

A secret kept by not speaking is the only kind that holds. Everything else — the confidence shared with one person, the thing you only hint at — is a secret in the process of getting out. So maunam is both an item on the list and an observation about the category it tops.

The item beside it does similar work. Among those who want to win, what is claimed is not strength but nīti, judgement about how to proceed.

Taken together they make an argument the chapter has been making in other forms. The powers that actually decide outcomes tend to be the quiet ones — knowing when not to speak, knowing which move to make. Neither looks like power from outside, which is exactly why they keep working.