Bhagavad Gita 18.51

बुद्ध्या विशुद्धया युक्तो धृत्याऽऽत्मानं नियम्य च।शब्दादीन् विषयांस्त्यक्त्वा रागद्वेषौ व्युदस्य च॥

buddhyā viśuddhayā yukto dhṛtyā''tmānaṃ niyamya ca |śabdādīn viṣayāṃstyaktvā rāgadveṣau vyudasya ca ||

Endowed with a pure intellect, controlling the self through firmness, relinquishing sound and other objects and abandoning attraction and hatred.

Guided always by pure reason, bravely restraining himself, renouncing the objects of sense and giving up attachment and hatred; he attains peace.

Our plain-language meaning of this verse is waiting for scholar review.