What metaphors are used in The Man Without Qualities Ii: The Like of It Now Happens by Robert Musil?

Very early in the first volume, which is not covered by this summary, it is explained using light as the metaphor. White light can be subdivided into the spectrum. Most people are like some part of this divided light, from which the rainbow of colors emerges. The Man Without Qualities is the undivided light so none of the divided colors show.