Art?

I've been thinking about Art recently. I think one of the main distinctions that can be made is the pre-reflective and the post reflective methods. The pre-reflective may reveal something about the cultural and biological world of human beings. Post-reflective can also show worlds that may not be obvious, like in modern art for example. It would appear at first modern art has no obvious world that it references to. But is this not the point? Modern art references the picture plane, through this it points to the world of art itself as a work among works.