Labor, Theory, Oracle

Marx-Engel's concept of "pure" theory, e. g. "theology, philosophy, ethics", as embodying non-material mental labor, abstracts from one dimension of the production of them--they are communicated, which requires physical exertion of some sort.  Thus, the producers of them have less in common with the priest who performs rituals in order to harness higher powers that can benefit a tribe, e. g. bring rain, than with the oracle, who is a medium of communication between the former and the latter.  But, such communication is still a material act that serves a social function, even if it is merely to prepare for the inevitable.  So, if the purpose of the exposition in these passages in the German Ideology is to correlate fundamental Division of Labor and Mind-Matter Dualism in some way, the presentation is less than convincing.