On non-being (or emptiness — wú 无):
Thirty spokes are united around the hub to make a wheel,
But it is on its non-being that the utility of the carriage depends.
Clay is molded to form a utensil,
But it is on its non-being that the utility of the utensil depends.
Doors and windows are cut to make a room,
But it is on its non-being that the utility of the room depends.
Therefore turn being into advantage, and turn non-being into utility.
(Tao-te ching, 11)
Weapons are instruments of evil, not the instruments of a good ruler.
When he uses them unavoidably, he regards calm restraint as the best principle.
Even when he is victorious, he does not regard it as praiseworthy,
For to praise victory is to delight in the slaughter of men.
There is always the master executioner (Heaven) who kills.
To undertake executions for the master executioner is like hewing wood for the master carpenter.
Whoever undertakes to hew wood for the master carpenter rarely escapes injuring his own hands.
(Translated by Wing-Tsit Chan)