GR translation: her glassy wastes

[Mark Kohut]

Man, proud man! Drest in a little brief authority, -. Most ignorant of what he's most 
assur'd,. His glassy essence, - like an angry ape,. 
     His glassy essence, like an angry ape, Plays such fantastic tricks before high 
heaven. As to make the angels weep. – William Shakespeare. ...
 
1. Characteristic of or resembling glass. 2. Lifeless; expressionless: "the face 
changing to a demon's face with a fixed glassy grin" (Katherine Anne Porter). ...

From: Mike Jing <gravitys.rainbow.cn at gmail.com>
To: Pynchon Mailing List <pynchon-l at waste.org>
Sent: Friday, October 28, 2011 4:37 AM
Subject: GR translation: her glassy wastes

P153.16-18 ...: he has to admire it, even if he can't accept her
glassy wastes, her appeals to a day not of wrath but of final
indifference...

What exactly are "her glassy wastes"?