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Another highlight is John Cage’s key work Writing through the Essay ‘On the Duty of Civil Disobedience’ (1985/91) on the upper floor of the Kunsthalle, which was first installed at documenta 8 in Kassel and impressively illustrates Cage’s idea of a total work of art through its use of space, sound, and light.
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https://www.kunsthalle-bremen.de/en/sb-page/collection/collection/art-after-1945 (18.05.2022)

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‘Essay’ illuminates Cage’s sophisticated palate of techniques, ideas and references. Language has been transformed into its musical form, poetry, and abstracted to become pure sound. Individual words and their meanings may be intermittently understood, but without their sentences these words have been stripped of intended purpose and constricting device. Released from familiar phrases they, like the sounds of his compositions, are heard rather than expected. The seemingly austere installation stretches the boundaries of the medium; the requisite three-dimensions are expanded to embrace a fourth, in time. The lighting’s slow undulation arrests the attention and clarifies perception—each day the chairs guide our gaze in a new direction.
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Victoria Miguel, MAP Magazine
https://mapmagazine.co.uk/john-cage (18.05.2022)