Bhashya
अतः पञ्चाग्निविदो गृहस्थाः, ये च इमे अरण्ये वान-प्रस्थाः परिव्राजकाश्च सह नैष्ठिकब्रह्मचारिभिः श्रद्धा तपइत्येवमाद्युपासते श्रद्धानास्तपस्विनश्चेत्यर्थः ; उपासनशब्द-स्तात्पर्यार्थः ; इष्टापूर्ते दत्तमित्युपासत इति यद्वत् ।श्रुत्य-न्तरात् ये च सत्यं ब्रह्म हिरण्यगर्भाख्यमुपासते, ते सर्वे अर्चि-षम् अर्चिरभिमानिनीं देवताम् अभिसंभवन्ति प्रतिपद्यन्ते ।समानमन्यत् चतुर्थगतिव्याख्यानेन ।एष देवयानः पन्थाव्याख्यातः सत्यलोकावसानः, न अण्डाद्बहिः, 'यदन्तरापितरं मातरं च' इति मन्त्रवर्णात् ॥
In plain words
Thus, householders who understand the five fires, along with forest dwellers, wandering monks, and lifelong students who meditate with deep faith and discipline -- those truly dedicated to austerity -- follow this path. The word 'meditation' holds its full weight here, much like the injunctions regarding ritual sacrifice and charity. As another text confirms, all those who meditate upon the supreme Brahman known as Hiranyagarbha reach the flame and attain the deity that presides over it. The rest of the journey follows the explanation of the fourth path. This path of the gods culminates in Satyaloka and remains within the cosmic egg, as confirmed by the scriptural verse, 'that which lies between the father and the mother.'
Close to the Sanskrit
Hence householders who know the five fires, and these forest dwellers and wandering monks together with lifelong celibate students, who meditate with faith and austerity -- meaning those possessing faith and practicing asceticism. The word meditation conveys its core purport, just as in the expression 'sacrifices, public works, and charity are practiced'. From another Vedic text, those who meditate on true Brahman, named Hiranyagarbha, all approach the flame and the deity presiding over the flame, attaining it. The rest is the same as the explanation of the fourth path. This path of the gods has been explained as ending in Satyaloka, not outside the cosmic egg, according to the scriptural verse 'which is between the father and the mother'.