You're HIDEOUS! and Sexy...

"Happiness is self-propagating. Begin it, spread it, live it."

I can't remember if this is an actual quote or something out of my own mind. The important thing to realize is that Light is also self-propagating and this is one of the reasons it can exist and travel in a vacuum. Light in general is probably one of the coolest things in nature. in A Wrinkle in Time the kids at one point end up in a world where the creatures are very kind and sensitive but have no eyes to speak of. Color can not be explained nor even really the concept of seeing. Furthermore light is both a particle and a wave which even though i understand the reasons for this dual nature still strikes me as odd. What else do we see this in? I'm thinking there must exist some other examples of things with a dual nature of some kind even if it can't be explained with either of these particular descriptions.

Cosmic brownie points as always for anyone who knows where the title of this post comes from.