“Our most important abstract concepts, from love to causation to morality, are conceptualized via multiple complex metaphors. Such metaphors are an essential part of those concepts, and without them the concepts are skeletal and bereft of nearly all conceptual and inferential structure. Each complex metaphor is in turn built up out of primary metaphors…. our system of primary and complex metaphors is part of the cognitive unconscious, and most of the time we have no direct access to it or control over its use.”
 73 George Lakoff and Mark Johnson (1999) Philosophy in the Flesh: The Emboidied Mind and its Challenge to Western Thought. New York: Basic Books.