स य आकाशं ब्रह्मेत्युपास्त आकाशवतो वै स लोकान्प्रकाशवतोऽसंबाधानुरुगायवतोऽभिसिध्यति यावदाकाशस्य गतं तत्रास्य यथाकामचारो भवति य आकाशं ब्रह्मेत्युपास्तेऽस्ति भगव आकाशाद्भूय इति आकाशाद्वाव भूयोऽस्तीति तन्मे भगवान्ब्रवीत्विति ॥ ७.१२.२ ॥
In plain words
He who worships space as Brahman attains worlds full of space and light, unconfined and wide-ranging. He moves at will so far as space reaches, who worships space as Brahman. "Is there, sir, anything greater than space?" "There is indeed something greater than space." "Tell me that, sir."
The commentators
Chāndogyopaniṣadbhāṣyam· bhāṣya
फलं शृणु—आकाशवतो वै विस्तारयुक्तान्स विद्वाँल्लोकान्प्रकाशवतः, प्रकाशाकाशयोर्नित्यसंबन्धात्प्रकाशवतश्च लोकानसंबाधान् संबाधनं संबाधः संबाधोऽन्योन्यपीडा तद्रहितानसंबाधान् उरुगायवतः विस्तीर्णगतीन्विस्तीर्णप्रचारॉल्लोकान् अभिसिध्यति । यावदाकाशस्येत्याद्युक्तार्थम् ॥
In plain words
Hear the result: The wise meditator attains expansive, shining worlds that are entirely free of obstruction. Because space and light are eternally linked, these realms are radiant and vast, offering complete freedom of movement without crowding or friction. The rest of the passage has already been explained.
Close to the Sanskrit
Listen to the fruit: The wise one attains expansive worlds possessing space, shining—because of the eternal connection between light and space—and luminous, unobstructed. Congestion is mutual affliction; he attains unobstructed worlds free from that, possessing wide strides, having expanded movements and expanded pathways. The passage beginning with 'As far as space' has its meaning already stated.