PURPORT

The universe is by nature dense darkness, and therefore the total creation is called tamas or darkness. The night is the real feature of the universe, for then no one can see anything, including oneself. The Lord, out of His causeless mercy, first desired to see Himself and all the creation as well, and thus the sun became manifested, the power of vision of all living entities became possible, and the objects of vision were also manifested. This means the whole phenomenal world became visible after the creation of the sun.