From that Erich Neumann book, page 298:

All unconscious contents have, as complexes, a specific tendency , a striving to assert themselves. Like living organisms, they devour other complexes and enrich themselves with their libido. We can see in pathological cases, in fixed or compulsive ideas, manias, and states of possession, and again in every creative process where “the work” absorbs and drains dry all extraneous contents, how an unconscious content attracts all others to itself, consumes them, subordinates and co-ordinates them, and forms with them a system of relationships dominated by itself. We find the same process in normal life, too, when an idea - love, work, patriotism, or whatever else - comes to the top and asserts itself at the cost of the others. One-sideness, fixation, exclusiveness, etc., are the consequences of this tendency of all complexes to make themselves the center.”