Highest good is like water. Because water excels in benefiting the myriad creatures without contending with them and settles where none would like to be, it comes closest to the way.
LaoziClay is fashioned into vessels; it is on their empty hollowness that their use depends. Doors and windows are cut out to make a dwelling, and on the empty space within, its use depends. Thus, while the existence of things may be good, it is the non-existence in them that makes them serviceable.
Laozi