I've long studied kung fu, where the philosophy and practice emphasize the shifting and dynamic balance of yin and yang, empty and full, left and right, body and mind and so on. Those are natural and embodied complements. But when we achieve that balance it is health, not sickness. It is harmony, not strife. It is love, not hate. All of the latter are a condition of imbalance and dysfunction. And that is the difference that makes a huge difference. Just because our language creates opposites doesn't mean they are all created equal.