The divine law may be spoken of,but it is not the common law.(Truth can be known,but it may not be the well-known truth or Truth can be known,but it may not be the truth you known.)Things may be named,but names are not the things.In the beginning heaven and earth are nameless;when named, all things become known.So we should be free from desires in order to understand the internal mystery of the divine law;And we should have desires in order to observe its external manifestations.Internal mystery and external manifestations come from the same origin,but have different names.They may be called essence.The essential of the essence is the key to the understanding of all mysteries.