Tao is the source of both fullness and emptiness. But it is itself neither fullness nor emptiness.
All the fish needs is to get lost in the water. All man needs is to get lost in Tao.
The World is Large - Its beauty indescrible.
When deeds and words are in accord, the whole world is transformed.
So 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.
Heaven does without doing through its purity, Earth does without doing through its calmness.