Chapter 5, Verse 20
Part of 5: Karm Sanyās Yog — कर्मसंन्यासयोगन प्रहृष्येत्प्रियं प्राप्य नोद्विजेत्प्राप्य चाप्रियम्। स्थिरबुद्धिरसम्मूढो ब्रह्मविद्ब्रह्मणि स्थितः॥
na prahṛiṣhyet priyaṁ prāpya nodvijet prāpya chāpriyam sthira-buddhir asammūḍho brahma-vid brahmaṇi sthitaḥ
Resting in Brahman, with a steady intellect and undeluded, the knower of Brahman neither rejoices upon obtaining what is pleasant nor grieves upon obtaining what is unpleasant.
This is the state of a Jivanmukta or a liberated sage or a Brahmana who identifies himself with the Self or Atman. He always has a balanced mind. He is never deluded. He has abandoned all actions as he rests in Brahman. He who has an unbalanced mind, who identifies himself with the body and mind feels pleasure and pain, exhilaration of spirits when he gets a pleasant object and grief when he obtains an unpleasant object. (Cf. VI.21?27?28XIII.12XIV.20)