Heidegger, Martin. Discourse on Thinking. A Translation of Gelassenheit. Translated by John M. Anderson and E. Hans Freund. New York: Harper & Row, 1969.

Contains two works: “Memorial Address” from 1955  and “Conversations on a Country Path about Thinking.”

Excerpt:

“Man today is in flight from thinking… But part of this flight is that man will neither see nor admit it. Man today will even flatly deny this flight from thinking.” –from “The Memorial Address”

Heidegger addresses the question of what thinking is. He distinguishes between “calculative thinking” and “meditative thinking” and treats the question of that which must occur to us the moment we manage to see a familiar situation in unfamiliar light.

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"Memorial Address" Chapter [pdf]