"Once Marcuse joins the Frankfurt School, this original Heideggerian Hegelianism is overlaid with a messianic concept of the future derived ultimately from Walter Benjamin. Now the future is not simply a human creation but a redemptive possibility interrupting the continuity of history. The essential potentialities, while remaining rationally grounded in social analysis and critique, delineate this redemption, revealing the world in its truth. As Adorno writes, “The only philosophy which can be responsibly practiced in face of despair is the attempt to contemplate all things as they would present themselves from the standpoint of redemption. . . . Perspectives must be fashioned that displace and estrange the world, reveal it to be, with its rifts and crevices, as indigent and distorted as it will appear one day in the messianic light. . . . Consummate negativity, once squarely face, delineates the mirror image of its opposite”".

 Andrew Feenberg “Heidegger and Marcuse. The Catastrophe and Redemption of History”