Light we can see. Went to many places because of the sun shining on the earth of us.However, darkness and light, it is useful both lack something impossible.
Brightness, we can see from the various locations, because the sun shines into the surface of the Earth; But the darkness with brightness, it is useful for both missing something.
The light goes on, we are able to see the various places within walking distance to the sun because it is the light of our world to the floor.But how can the darkness, and the light was a benefit to both lack of what one of the things to do.