This volume of the Collected Works edition contains Gurwitsch's magnum opus, which emphasizes how items in the thematic field are relevant to the theme. It is introduced by his student Richard Zaner. This volume also includes the posthumous text, "Marginal Consciousness," the contents of which were merely summarized in The Field of Consciousness. It presents his positions on the body and on ego-less consciousness in detail. Gurwitsch's student, Lester Embree, introduces it. For the full appreciation of their significance, all earlier and later writings by Gurwitsch must be related to the contents of this volume.