The light that some Christians give off is like the moon – it gives light, but it’s pretty dim. So dim in fact that you can look directly at the moon without it effecting you. You can’t look at the sun like that. But this is the kind of light that is needed. The sun light’s up everything; nothing is hidden; sunlight changes things through osmosis; sunlight brings warmth; sunlight stimulates growth. So when the light of your good deeds shines through in public, it’s effective. People see God revealed and it changes things.