The "secret, subterranean river" of Shulevitz is
a flow of thought favorable to the cause of feminism,
but not necessarily to other "revolutionary" ideas.
Compare and contrast:
"Where Alph, the sacred river, ran"
— Coleridge, Kubla Khan
"Where Aleph the sacred symbol ran"
— Cullinane, "The Coxeter Aleph"
For group discussion:
How (if at all) is the "finitude" of Heidegger related to
mathematical finitude and The King of Infinite Space ?