रेत एव यस्यायतनं हृदयं लोको मनो ज्योतिर्यो वै तं पुरुषं विद्यात्सर्वस्यात्मनः परायणं स वै वेदिता स्यात् ।याज्ञवल्क्य वेद वा अहं तं पुरुषं सर्वस्यात्मनः परायणं यमात्थ ।य एवायं पुत्रमयः पुरुषः स एषः ।वदैव शाकल्य तस्य का देवतेति ।प्रजापतिरिति होवाच ॥बृह. ३,९.१७ ॥
In plain words
"He whose dwelling is the seed, whose world is the heart, whose light is the mind — he who knows that person, the highest goal of every self, would truly be a knower, Yājñavalkya." "I do know that person, the highest goal of every self, of whom thou speakest. He is the person made of a son. Speak on, Śākalya. Which is his deity?" "Prajāpati," he said.