There isn't just the sun. There are other kinds of lights.
There is also the moon. Then there are the stars.
Then there are lights that are so mysterious they defy description. Like the northern lights. If you've never witnessed them, I can only say that they are beyond comprehension. They are magical. They are outside of anything we would expect.
There are also other lights spiritually. The light you fell in love with... the light you carry now in your breast... the light you treasure above all others... please remember that it is not the only one.
There are other kinds of lights.