What silence rules the ghostly hours
That guard the close of human sleep!
(“The Testimony of the Suns”)

And starward drifts the stricken world,
Lone in unalterable gloom
Dead, with a universe for tomb,
Dark, and to vaster darkness whirled.
(“The Testimony of the Suns”)

A little while, their hunger unfulfilled,
The mothlike worlds flit 'round the guttering sun.
("Ephemera")

I have heard the languages of apocalypse, and now I shall embrace the silence.

The silence that is in the starry sky,The sleep that is among the lonely hills.

And how should we behave during this Apocalypse? We should be unusually kind to one another, certainly. But we should also stop being so serious. Jokes help a lot. And get a dog, if you don't already have one.