Pepper is as direct a symbol for fire as you could get. The pepper pot is the human body with the holy fire inside it. And Zoroastrianism being a monotheistic religion, it's saying that the fire which is Ahura Mazda is the whole ball of wax, even at night when the physical sun is out of sight.

Now can somebody tell Mr Walkaboutsverse that he's been singing a song imported by Iranian immigrants?