Your life is a source of light. Don't waste precious time worrying how much darkness exists beyond the reach of your light, whether your light is bright enough, or how the darkness feels about your brilliance, or when your light will burn out. Just shine.
http://www.youtube.com/watch?v=0K2k19IiTaY It's dark out there. And a lot of folks barely have enough light to get through the seconds, minutes, and hours in front of them. For those with big lights, now more than ever turn it up. Shine bright.