Without the Brahmana, all would be darkness. Nothing would be known. The four castes would not exist. The distinction between virtue and sin, Truth and Untruth, would disappear.
अन्धं स्यात् तम एवेदं न प्रज्ञायेत किंचन। चातुर्वण्र्यं न वर्तेत धर्माधर्मावृतानृते॥