Its more than a simple belief that there is good and that it should fight the evil in the world. It's a personification of Light and Darkness at their most elemental level, as forces that are so absorbed with themselves that one cannot exist without the other though they constantly try to consume one another. One of the earliest repersentations of Light and Darkness was of Light being a massive black bull and Darkness being an enormous white bull.

I stifled a sigh and ignored the Imprinted Drunk Vision Girl.

It's not just a sunset; it's a moonrise too.

But you don't belong here! You're dead!" I sobbed against his chest. "Zo, babe, this is the Otherworld. It's not me who doesn't belong here-it's you.

Kayla Robinson, if you don't shut up I'll fly down there and suck every last bit of blood from your stupid cheating cow body!

There's you. There's me. We love each other, and we have since we were kids, so we should be together. The end.

I'm her protection! I don't care if it's in this world or the next. Just show me how to get where she is, and I'll be there for her. ~Stark