Silent Night, be the light.

I went to the candlelight Christmas Eve service. Got me thinking about light. We have been studying light in my class this year. Student had a lot of ideas about how light worked so that we could see stuff. The only way we see the world is that light has to hit an object and come back to your eyes. If you don't have the eyes to see it or the light to light it then there is no perception of sight. When light is shining on it, the type of light it is affects how you perceive the object. I don't think it was an accident that Jesus said we were to be light to the world. Light doesn't say anything but controls whether you see anything at all, and affects how you see the world. Light doesn't choose what it shines on, it shines and anything in a direct unblocked path is lit by it. Being a light is not optional. We are all lights. What type are we? Do we shine everywhere, or just on who and where we want to? Life can be dark, be the light people need when it's too dark to see? Where is it dark, and what does it look like to be a light to those lives?