Bhashya
अथ होवाच सत्ययज्ञं पौलुषिम्-हे प्राचीनयोग्य कं त्वमा-त्मानमुपास्से इति ; आदित्यमेव भगवो राजन इति ह उवाच ।शुक्लनीलादिरूपत्वाद्विश्वरूपत्वमादित्यस्य, सर्वरूपत्वाद्वा, सर्वा-णि रूपाणि हि त्वाष्ट्राणि यतः, अतो वा विश्वरूप आदित्यः ; त-दुपासनात् तव बहु विश्वरूपमिहामुत्रार्थमुपकरणं दृश्यते कुले ॥
In plain words
Then the teacher explained the passage beginning with: 'O Satyayajña Pauluṣi, Prācīnayogya, which self do you worship?' and the reply: 'The sun alone, O revered king.' Because the sun exhibits white, blue, and other colors, or because it encompasses every form—since all forms originate from Tvaṣṭṛ—the sun is truly all-formed. Through meditating upon it, an abundance of diverse wealth and equipment for both this world and the next is visible in your household.
Close to the Sanskrit
Then he spoke to Satyayajña Pauluṣi, O Prācīnayogya: 'Which self do you worship?' thus; 'The sun indeed, O revered king,' thus he spoke. Because of the sun's being of white, blue, and other forms, or because of its being of all forms, for all forms are produced by Tvaṣṭṛ, therefore the sun is all-formed; from the worship of that, much all-formed equipment for this world and the next is seen in your family.