The book offers a comprehensive framework – both practical and theoretical – for investigating and developing our human nature as psychophysical unities. Chapter 1 establishes a practical framework, the ‘psychophysical lab’, as a means of observing, studying and developing the relations between mental and physical aspects of human nature through yoga practice; Chapter 2 shows how yoga practice can foster a mutual development of our mental and physical faculties. Chapter 3 offers a philosophical and historical analysis of the mind-body problem – its origin, development, and possible solution. In Chapter 4, the authors recommend practice sequences with marked mental benefits, such as confidence, balance and optimism.