To speak technically photography is the art of writing with light. But if I want to think about it more philosophically, I can say that photography is the art of writing with time. When you capture an image you capture not only a piece of space, you also capture a piece of time. So you have this piece of specific time in your square or rectangle. In that sense I find that photography has more to do with time than with light.
Histories used often to be stories: the fashion now is to leave out the story. Our histories are stall-fed: the facts are absorbed by the reflexions, as the meat is sometimes by the fat.