One of the most difficult features of direct experience is that it is unfiltered by any theories or expectations. It's hard to observe without imposing a theory to explain what we're seeing, but the trouble with theories, as Einstein said, is that they explain not only what is observed, but what can be observed. We start to build expectations based on our theories.
Michael CrichtonIf you don't know history, then you don't know anything. You are a leaf that doesn't know it is part of a tree.
Michael Crichton