The ancient masters were subtle, mysterious, profound, responsive. The depth of their knowledge is unfathomable. Because it is unfathomable, All we can do is describe their appearance. Watchful, like men crossing a winter stream. Alert, like men aware of danger. Courteous, like visiting guests. Yielding, like ice about to melt. Simple, like uncarved blocks of wood. Hollow, like caves. Opaque, like muddy pools. Who can wait quietly while the mud settles? Who can remain still until the moment of action? Observers of the Tao do not seek fulfillment. Not seeking fulfillment, they are not swayed by the desire for change.