[littlemanpoet]

Originally Posted by Hookbill

But, yes, you are right, light came before the sun even in Genesis.

Not only in Genesis. It's in many myths around the world, as Alatar relates. Mesopotamian, Mesoamerican, Nordic, Oriental, Greek, Egyptian, etc.

Originally Posted by Hookbill

The obvious question is ‘where is the light coming from?

Indeed. Tolkien's answer was "the Two Trees". Genesis is not the only source for the tree archetype though. The Norse have Yggdrasil. There may be other myths that feature something like it, maybe not a tree..

What's fascinating is that from many myths around the world, the light before the sun comes from what is called, depending upon the ancient culture, "the great sun", "the unmoved mover", "the polar sun", and so forth. The "great sun" is always at the north pole, and it is always associated with the planet Saturn. Which begs the question, "were they all equally nuts, or was earth's sky different within human memory than it is now?"

Obviously, Tolkien didn't pick up on this Saturnian theme. On the contrary, he located his evil persona, Morgoth, in the frigid North instead.

Originally Posted by Hookbill

I think this ties in with the idea that there is some sort of 'Golden Age'

This again is common to all ancient myths, when the earth produced abundantly, there was no sun, and there was no extreme of hot and cold. All of these cultures' myths share so many inexplicable traits like this, yet they knew nothing of each other. It suggests, strongly, that something was going on that we have forgotten about, or perhaps ignore, calling it "superstition" while not really understanding it.

Tolkien obviously knew a lot about different myths, especially the Norse, Finnish, and Greek, and perhaps Celtic. It comes as no surprise that he incorporated much of the ideas and archetypes from them into Middle Earth.

What I do find intriguing is that in his later years he wanted to try to "correct" his early stories to fit the current structure of the solar system. I think this was a mistake because it is to presume that the solar system always was as it is now. Fact is, it's littered with shrapnel and disarray as if it has been a war zone of some cosmic kind: asteroid belt, comets, various moons and planets with striations crisscrossing them; planets rotating oddly, unstable atmospheres - all of which should not exist in a solar system unchanged for billions of years.