Since René Decartes suggested we were only "minds" in the 1600's we've struggled with over-rationalizing everything. This has created a divide between what is rational and irrational, and has made intuition suspect. An emerging school of psychology is now clearly debunking this misperception, showing that we understand the world viscerally—with our five senses first—and our rational mind second. This is great news for designers because, ironically, it's rational evidence that intuition is a powerful and legitimate design approach. This truth has been primarily discovered through metaphors. Quips like, “that’s over my head”, “her looks could kill” or “he’s cold-hearted” reveal deep connections between our physical senses and our emotional experiences. Designers regularly use this language to talk about their work, but it is only recently that we’ve discovered these aren’t subjective descriptions about what we make. They are deep seated human truths, actionable principles.