6).
Now there is nothing startling in this view.

In opposition to the unsatisfactory attempts of modern scholars, it is the traditional interpretation of Mitra and Varuna that Mitra was god of day (_i.e.,_ the sun), and Varuna the god of night (_i.e.,_ covering),[85] while native belief regularly attributes to him the lordship of water[86].
The 'thousand eyes' of Varuna are the result of this view.

The other light-side of Varuna as special lord of day (excluding the all-heaven idea with the sun as his 'eye') is elsewhere scarcely referred to, save in late hymns and VIII.

41.[87] In conjunction with the storm-god, Indra, the wrath-side of Varuna is further developed.

The prayer for release is from 'long darkness,' _i.e._, from death; in other words, may the light of life be restored (II.27.