In plain words
The poet, to the Lord: You alone are the three causes [material, efficient and instrumental], and you become all the worlds of the cosmos; so you are the light that needs no testing, and as that you shine forth in the abiding word [the Veda]. You rule the Veda, you are the one the sacrifices worship, you rule heaven [Paramapadam] and earth alike, and you are the first cause of the longing to reach you; and you became a cowherd: what wonder is this wonder!