The Yoga of the Division of the Three Gunas

Krishna continues describing the characteristics: 'Sama-duḥkha-sukhaḥ sva-sthaḥ'—equal (sama) in pleasure (sukhaḥ) and pain (duḥkha), self-controlled (sva-sthaḥ). 'Sama-loṣṭāśma-kāñcanaḥ'—regards a clod of earth (loṣṭa), a stone (aśma), and gold (kāñcanaḥ) as equal (sama). 'Tulya-priyāpriyo dhīras tulya-nindātma-saṁstutiḥ'—equal (tulya) to the dear (priya) and the unfriendly (apriyaḥ), steady (dhīraḥ), and to whom censure (nindā) and praise (ātma-saṁstutiḥ) are one and the same (tulya). This describes complete equanimity: equal response to pleasure and pain, to valuable and worthless, to friend and foe, to praise and blame. This is the mark of transcendence: you're not affected by the dualities of material existence. You remain steady regardless of external circumstances.