In the deepest darkest parts of the sea where it is perpetually night, all is not black. Bioluminescence. The fish have lights on them.
In the deepest core of the earth, past suffocating darkness that you can touch, molten fire glows. The farthest reaches of deep space have no lack of stars.
After the sun goes down, fireflies twinkle.
In the darkest hour is when the sun again rises.
Signs of hope that we are not left alone.
Reminders that Light is Life.