Interesting correlation between God and light in major world religions...

[Belacqua]

correlation between God and light in the major world religions....

Yes! An important aspect of understanding religion!

I do want to be careful about the use of metaphor when discussing light/God. It wouldn't be good to take things too literally. 

In Christianity, one of the main reasons people talk about the sun and light when they're really discussing God is because God is said to emanate, or "shine out" the world. As the sun shines out light. It's difficult to think of existence emanating from something non-material, so the metaphorical expression is used pretty much constantly. 

There are a number of further uses for this. For example, if God is the Form of the Good -- Goodness itself -- then we can say that the good which appears in the world is separated or divided. Imagine a prism, and goodness shining through it. The goodness is divided on the far side. But its pre-division origin is as wholeness and perfectly white light. If we imagine re-combining the colors into the whiteness, this is a way of imagining God. 

Another metaphor is of reflection. The white light shines out of the sun, but each object in the world reflects a portion of that full spectrum, and thus appears as a color. In the same way, goodness originates with God, and each object or person in the world reflects that portion of the spectrum of goodness that its nature allows. As a leaf reflects the green portion of the spectrum from the white light of the sun, the positive qualities that you and I have are partial reflections of the entirety of the Good. 

All of this is from Dante. 

But again, this is a metaphorical way of understanding, in which we represent goodness as light. We shouldn't say that light is the good per se.

Or as Blake put it:

God Appears & God is Light 
To those poor Souls who dwell in Night 
But does a Human Form Display 
To those who Dwell in Realms of day