I say... Our sensory world is anything but pure and truthful. Built and transformed by evolutionary history into a very peculiar edifice, it responds to only one particular slice of possible sensory space. Our brains then process this sensory stream to extract certain kinds of information, ignore other kinds of information, and bind the whole thing together into an ongoing story that is understandable and useful. Furthermore, by the time we are aware of sensations, they have evoked emotional responses that are largely beyond our control and that have been used to plan actions and understand the actions of others.
Joe Sayers, as usual, gets to the point more directly.