Light on one side, dark on the other. Two completely separate and different sides, conjoined in the middle.

But there are some stones that bridge the gap...

(Also, while I don't usually mess about with this on my photos, this one requires it: I apologize for the seemingly low quality. This was within a very, very dark large room, from a long distance away. The reason I posted this, was for the select few that are able to look beyond the physical aspect of a photo and see what it really means to them.)