Chapter XVIII · Śloka 51
बुद्ध्या विशुद्धया युक्तो धृत्यात्मानं नियम्य च |
शब्दादीन्विषयांस्त्यक्त्वा रागद्वेषौ व्युदस्य च ||
शब्दादीन्विषयांस्त्यक्त्वा रागद्वेषौ व्युदस्य च ||
buddhyā viśuddhayā yukto dhṛtyātmānaṃ niyamya ca |
śabdādīn viṣayāṃs tyaktvā rāga-dveṣau vyudasya ca ||
śabdādīn viṣayāṃs tyaktvā rāga-dveṣau vyudasya ca ||
Endowed with a purified intellect, restraining oneself with steadfastness, abandoning sound and other sense-objects, and casting aside attraction and aversion —
The description of the path to Brahman begins with purification of the inner instrument: the intellect clarified, the self held steady, the senses withdrawn from their objects, and the fundamental movements of liking and disliking relinquished.