The works of Ādi Śaṅkarācārya

Bṛhadāraṇyakopaniṣadbhāṣyam

Verse 182

पृथिव्येव यस्यायतनमग्निर्लोको मनो-ज्योतिर्यो वै तं पुरुषं विद्यात्सर्वस्यात्मनःपरायणँ स वै वेदिता स्यात् ।याज्ञव-ल्क्य वेद वा अहं तं पुरुषँ सर्वस्या-त्मनः परायणं यमात्थ य एवायँ शा-रीरः पुरुषः स एष वदैव शाकल्य तस्यका देवतेत्यमृतमिति होवाच ॥ १० ॥

In plain words

Earth is its home, fire is its world, mind is its light. Whoever comes to know this person as the final refuge of every self — that one truly knows. ‘Yājñavalkya, I do know that person, the final refuge of every self, the one you're speaking of — this very body sitting here.’ ‘Go on then, Śākalya — what is his deity?’ ‘The immortal,’ he said.

Close to the Sanskrit

Earth alone is [this deity's] abode, fire is [its] world, mind is [its] light. Whoever should know that person as the final refuge of the self of all, he indeed would be a knower. 'Yājñavalkya, I do know that person, the final refuge of the self of all, of whom you speak — this one that is the bodily person, this one here. Speak on then, Śākalya — which is his deity?' 'The immortal,' he said.