Sanskrit
न प्रहृष्येत्प्रियं प्राप्य नोद्विजेत्प्राप्य चाप्रियम् । स्थिरबुद्धिरसंमूढो ब्रह्मविद्ब्रह्मणि स्थितः ॥
na prahṛṣyet priyaṃ prāpya nodvijet prāpya cāpriyam sthirabuddhir asammūḍho brahmavid brahmaṇi sthitaḥ
Translation
With Reason firm, unperplexed, the knower of the Eternal established in the Eternal, neither rejoiceth on obtaining what is pleasant, nor sorroweth on obtaining what is unpleasant.
Annie Besant · The Bhagavad-Gita, translated by Annie Besant (4th ed., 1922) — Wikisource · Public Domain
Explanation
This comes close to a direct echo of chapter 2’s sthitaprajna description — unmoved by joy or sorrow — but relocated here as the psychological signature of the brahma-vid, one who knows Brahman, rather than as a portrait of the ideal renunciant in the abstract. Sthira-buddhi, firm intellect, and asammūḍha, unbewildered, name the same steadiness from two angles: one structural, the faculty simply doesn’t waver, and one experiential, confusion doesn’t arise in the first place. The chapter keeps circling back to this same disposition from different entry points — action, the perception of other beings, and now the response to one’s own fortune — as if testing whether it holds up under every kind of pressure.