Albert Rothenberg, M.D. first described or discovered a process he termed "homospatial thinking," which consists of actively conceiving two or more discrete entities occupying the same space, a conception leading to the articulation of new identities. Homospatial thinking has a salient role in the creative process in the following wide variety of fields: literature, the visual arts, music, science, and mathematics. This cognitive factor, along with "Janusian thinking," clarifies the nature of creative thinking as a highly adaptive and primarily nonregressive form of functioning.
There is a section of my book Significant Moments whose manifest content describes Richard Wagner's composition of his final opera, Parsifal, and the death of Wagner. Superimposed on the text is the metaphor of the 9/11 terrorist attack and the Oklahoma City bombing by Timothy McVeigh.
From a staging of Wagner's Parsifal