ब्रह्म ह वा इदमग्र आसीत् एकोऽनन्तः प्रागनन्तो दक्षिणोऽनन्तः प्रतीच्यनन्त उदीच्यनन्त ऊर्ध्वान् चाऽवान् च सर्वतोऽनन्तः न ह्यास्य प्राच्यादि दिशः कल्पन्तेऽथ तिर्यग्वान् चोर्ध्वं वा अनूह्य एष परमात्माऽपरिमितोऽतर्क्योऽचिन्त्य एष आकाशात्मा एवैष कृत्स्नक्षय एको जागर्तीति एतस्मादाकाशादेष खल्विदं चेतामात्रं बोधयति अनेनैव चेदम् ध्यायते अस्मिन् च प्रत्यस्तं याति अस्यैतद्भास्वरं रूपं यदमुष्मिन्नादित्ये तपति अग्नौ चाधुमके यज्ज्योतिश्चित्रतरमुदरस्तोऽथ वा यः पचत्यन्नम् इत्येवं ह्याह यश्चैषोऽग्नौ यश्चायं हृदये यश्चासावादित्ये स एष एका इत्येकस्य हैकत्वमेति य एवं वेद ॥६.१७ ॥
In plain words
In the beginning this was Brahman, one and endless — endless to the east, endless to the south, endless to the west, endless to the north, and above and below, endless in every direction. For it there is no reckoning of quarters, east and the rest, nor across, nor above. This highest Self is unmeasured, beyond reasoning, unthinkable; its self is space. When all else perishes, this alone stays awake. Out of this space it wakens this world, which is nothing but consciousness; by this alone is this meditated upon, and in this it goes to its setting. This is its shining form, which burns in yonder sun, and in the fire without smoke, and the light that is more wonderful still within the body, or that which cooks food. So it is said: "He who is in the fire, and he who is here in the heart, and he who is yonder in the sun — he is one." He who knows thus goes to the oneness of the One.