śrī-bhagavān uvāca
prakāśaḿ ca pravṛttiḿ ca
moham eva ca pāṇḍava
na dveṣṭi sampravṛttāni
na nivṛttāni kāńkṣati

udāsīna-vad āsīno
guṇair yo na vicālyate
guṇā vartanta ity evaḿ
yo ’vatiṣṭhati neńgate

sama-duḥkha-sukhaḥ sva-sthaḥ
sama-loṣṭāśma-kāñcanaḥ
tulya-priyāpriyo dhīras
tulya-nindātma-saḿstutiḥ

mānāpamānayos tulyas
tulyo mitrāri-pakṣayoḥ
sarvārambha-parityāgī
guṇātītaḥ sa ucyate

Translation of Bhagavad Gita 14.21

The Supreme Personality of Godhead said: O son of Pandu, he who does not hate illumination, attachment and delusion when they are present or long for them when they disappear; who is unwavering and undisturbed through all these reactions of the material qualities, remaining neutral and transcendental, knowing that the modes alone are active; who is situated in the self and regards alike happiness and distress; who looks upon a lump of earth, a stone and a piece of gold with an equal eye; who is equal toward the desirable and the undesirable; who is steady, situated equally well in praise and blame, honor and dishonor; who treats alike both friend and enemy; and who has renounced all material activities—such a person is said to have transcended the modes of nature.

Commentary by Sri A.C. Bhaktivedanta Swami Prabhupada of Gaudiya Sampradaya:

Arjuna submitted three different questions, and the Lord answers them one after another. In these verses, Krishna first indicates that a person transcendentally situated has no envy and does not hanker for anything. When a living entity stays in this material world embodied by the material body, it is to be understood that he is under the control of one of the three modes of material nature. When he is actually out of the body, then he is out of the clutches of the material modes of nature. But as long as he is not out of the material body, he should be neutral. He should engage himself in the devotional service of the Lord so that his identity wit