The non-action of the wise man is not inaction. It is not studied. It is not shaken by anything. The sage is quiet because he is not moved, not because he wills to be quiet. . . . Joy does all things without concern. For emptiness, stillness, tranquillity, tastelessness, silence, and non-action are the root of all things.
ZhuangziThe living all find death unpleasant; men mourn over it. And yet, what is death, but the unbending of the bow and its return to its case?
ZhuangziSo if loss of what gives happiness causes you distress when it fades, you can now understand that such happiness is worthless. It is said, those who lose themselves in their desire for things also lose their innate nature by being vulgar.
Zhuangzi