It is my mind, with its store of images, that gives the world color and sound; and that supremely real and rational certainty which I can "experience" is, in its most simple form, an exceedingly complicated structure of mental images. Thus there is, in a certain sense, nothing that is directly experienced except the mind itself. Everything is mediated through the mind, translated, filtered, allegorized, twisted, even falsified by it. We are . . . enveloped in a cloud of changing and endlessly shifting images.