Part 3 - There is impermanence because change is the nature of things

Because there is passing away and change, there is impermanence:

Within the impermanent play of the rain-clouds of this life,
In garlands of flashing lightning, dances the Lord of Death.
Day and night, the falling rain of the changing seasons
Drowns whatever sprouts may grow within the three levels.

Ornamented by the essence of the freedom and favors, the dark summer cloud-banks of this life gather, while, as an intrinsic part of them, wreathed in quivering bolts of lightning, the Lord of Death performs his dance. Day and night, not pausing for an instant, the rain of immanent death falls constantly, flooding out and drowning all the sprouts of sentient beings dwelling within the three worlds. The Vast Play says:

The three worlds' impermanence is like the clouds of autumn.
The birth and death of beings has the aspect of a dance.
The lives of beings vanish like lightning into space.
Like waterfalls cascading down a precipitous mountain,
As quickly as the water comes it falls away.