Mantra 14

तदेतदिति मन्यन्तेऽनिर्देश्यं परमं सुखम् ।कथं नु तद्विजानीयां किमु भाति विभाति वा ॥ १४ ॥

In plain words

"That is this," they think of it -- the indescribable, supreme happiness. How, indeed, may I come to know it? Does it shine of itself, or shine only by reflection?