How we see the world determines what we photograph. How can 10 people take a camera to a scene and get 10 completely different photos? I'm not talking about the trivial photographs, where the subject is centered in the frame and the camera set on automatic everything. I refer to ART OF PHOTOGRAPHY ... the unique angle, the interplay of light and shadow, the overall composition, use of textures, distance from the subject, depth of field, and so forth. Close up? Wide angle? Over exposure? Black and white?
As I have matured in my photography, I find myself developing "a style" which I believe colors how I photograph. This is good in one way ... because a style can evolve and refines how we see. On the other hand, when I see the style of another photographer, I realize that my style also limits me.
When Einstein says "It is the theory which decides what we can observe" can be colloquially paraphrased as "If I hadn't believed it, I wouldn't have seen it." I agree with this. To me this says, "It is how I consider the world (theory) which decides what I can photograph (observe).
I see with my camera ... therefore I am.