From that Purusha thus born of Tamas and having Brahma for his parent, came into existence the Being called Brahman. Brahman, wishing to create creatures caused Agni and Soma to originate from his own own eyes. Afterwards when creatures were to be created, the ceated persons came out in their due order as Brahmanas and Kshatriyas. He who came into being as Soma was none else than Brahma; and they that were born as Brahmanas were all Soma in sooth. He who came into Being as Agni was none else than Kshatriya. The Brahmanas became gifted with greater energy than the Kshatriyas. If you enquire about the reason thereof, the answer is that this superiority of the Brahmanas to the Kshatriyas is an attribute which is manifest to the whole world. It occurred as follows. The Brahmanas represent the eldest creation amonst men. None were created before who were superior to the Brahmanas. He who offers food into the mouth of a Brahmana is considered as pouring libations into a burning fire. I say that having arranged things thus, the creation of creatures was accomplished by Brahman. Having established all created beings in their respective positions, he keeps us the three worlds. There is a similar declaration in the Mantras of the Shrutis.
तस्येदानीं तमसः सम्भवस्य पुरुषस्य ब्रह्मयोनेर्ब्रह्मणः प्रादुर्भावे स पुरुषः प्रजाः सिसृक्षमाणो नेत्राभ्यामग्नीषोमौ ससर्ज। ततो भूतसर्गेषु सृष्टेषु प्रजाक्रमवशाद् ब्रह्मक्षत्रमुपातिष्ठत्। यः सोमस्तद् ब्रह्म यद् ब्रह्म ते ब्राह्मणा योऽग्निस्तत् क्षत्रं क्षत्राद् ब्रह्म बलवत्तरम्। कस्मादिति लोकप्रत्यक्षगुणमेतत्तद्यथा। ब्राह्मणेभ्यः परं भूतं नोत्पन्नपूर्व दीप्येमानेऽग्नौ जुहोति। यो ब्राह्मणमुखे जुहोतीति कृत्वा ब्रवीमि भूतसर्गः कृतो ब्रह्मणा भूर नि च प्रतिष्ठाप्य त्रैलोक्यं धार्यत इति मन्त्रवादोऽपि हि भवति॥