“In most cases, to be reasonable means not to be obstinate, which in turn points to conformity with reality as it is. The principle of adjustment is taken for granted. When the idea of reason was conceived, it was intended to achieve more than the mere regulation of the relation between means and ends: it was regarded as the instrument for understanding the ends, for determining them.”
Source: Eclipse of Reason (1947), p. 10.
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Max Horkheimer 61
German philosopher and sociologist 1895–1973Related quotes

Source: Who Is Man? (1965), Ch. 5<!-- The sense of the ineffable, p. 88 -->
Context: Our concern with environment cannot be reduced to what can be used, to what can be grasped. Environment includes not only the inkstand and the blotting paper, but also the impenetrable stillness in the air, the stars, the clouds, the quiet passing of time, the wonder of my own being. I am an end as well as a means, and so is the world: an end as well as a means. My view of the world and my understanding of the self determine each other. The complete manipulation of the world results in the complete instrumentalization of the self.

Source: Selected Essays (1904), "Sacred and Profane" (1891), p. 41