“Therefore I say: Eä! Let these things Be! And I will send forth into the Void the Flame Imperishable, and it shall be the heart of the World, and the World shall Be;” — Silmarillion, Ainulindalië
Also known as the secret fire, as in “I am servant of the Secret Fire.”
I didn’t realize how hard the Ainulindalië was going to be to draw, but nothing really had a corporeal form at first, and there was only briefly light outside of Aman until the rise of Man.