This collection explores the structure of consciousness and its place in the world, or inversely the structure of the world and the place of consciousness in it. Amongst the topics covered are: the phenomenological aspects of experience, dependencies between experience and the world and the basic ontological categories found in the world at large. Developing ideas drawn from historical figures such as Descartes, Husserl, Aristotle, and Whitehead, the essays together demonstrate the interdependence of ontology and phenomenology and its significance for the philosophy of mind.