The landscape in the pillow

[Achebe]

We wander into Sleep,
the gates of this holiest church
rusted and overgrown.
The cult of Dreamers -
in our nightcaps, gowns, and slippers -
marches onwards, into Sleep.

The landscape in the pillow greets us:
the spires of Somnium Terra 
punctuate its verdancy .....I think the metaphor is getting lost a bit. First, sleep was a church, and now it's a country (somnium terra). I am also confused as to whether you are being entirely metaphorical here, or whether you are making a reference to an actual design on the fabric of your pillow as well. If it's entirely metaphorical, then 'landscape in the pillow' is a bit...weak.  
like full stops in a love letter,
as in a mystical fetter
the avatar of Life withers.  

But what of the need to guard this place?
- To save our cardboard Christendom
from these marauding Mosselmen, ....the marauding mussalmans haunt your sleep, passable
their scriptures of the Real
aloft in ev'ry meeting place
throughout our holy lands.

A sermoniser crests the mount,
shorn of beard and robe,
a column of light its only form.....''Its' or 'his'? You've sort of lost me by this point.
'Whichever metamorphosis appeals to you,
my resting babes' it says, 'do not be pressed
in dirt and age. The only sage is called Unreal.'

Hi Heslop - brief crits above. I think the last stanza is quite cryptic. 
Overall, you might want to make the metaphor tighter.