I read about one hundred pages from this book and here was the part which stood out the most in my memory:
With this neither gay nor sad science of foams, the third book of Spheres presents a theory of the current age whose main tenor is that deanimation has an insurmountable lead over reanimation. It is the inanimable outside that gives food for thought in intrinsically modern times. This conclusion will inevitably drive the nostalgic yearning for a conception of the world, which still aims for a livable whole in the education-holistic sense, into resignation. For whatever asserts itself as the inner realm, it is increasingly exposed as the inner side of an outside. No happiness is safe from endoscopy; every blissful, intimate, vibrating cell is surrounded by swarms of professional disillusioners, and we drift among them — thought paparazzi, deconstructivists, interior deniers and cognitive scientists, accomplices in an unlimited plundering of Lethe.
I know that Sloterdijk is sometimes considered a genius on the Continent, and is virtually a household name in Germany, but you can sign me up as one of the professional disillusioners. Here is part of the problem (from this review):
This is fundamentally a work of philosophy, and its author is in more or less avowed dialogue throughout with the thought of Martin Heidegger, whose disquisitions on time and space describe a rooted, authentic sense of being in the world that Sloterdijk wants in part to counter with his vision of mobile spheres.