Shelley and Heidegger

Wikipedia states below on Heidegger:

"In the later writings, two recurring themes are poetry and technology.
Heidegger sees poetry as a pre-eminent way in which beings are revealed "in
their being." The play of poetic language (which is, for Heidegger, the
essence of language itself) reveals the play of presence and absence that is
being itself. Heidegger focuses especially on the poetry of Holderlin."

I first encounterd the relevance and possible tension between poetry and
technology in Shelley's "Defence of Poetry," which I read in 1988, and which
compares "to poeien" and "to logizein" as two currents of mental work.
(These two phrases are spelled differently in the first paragraphy of the
essay at http://www.fordham.edu/halsall/mod/shelley-poetry.html, but the
rest of the essay is the same as the Norton Anthology, which uses the
spelling "to poiein" and "to logizein.") See also
http://www.geocities.com/genius-2000/PoliticalAesthetics4.html