Aristotle initiated the systematic investigation of perception, the emotions, memory, desire and action, developing his own account of these phenomena and their interconnection. The Undivided Self aims to gain a philosophical understanding of his views and to examine how far they withstand critical scrutiny. Aristotle's account, it is argued, constitutes a philosophically live alternative to conventional post-Cartesian thinking about psychological phenomena and their place in a material world. Charles offers a way to dissolve, rather than solve, the mind-body problem we have inherited.