Philosophy of mind
Dualism is a set of views about the relationship between mind and matter (or body). It begins with the claim that mental phenomena are, in some respects, non-physical. One of the earliest known formulations of mind–body dualism was expressed in the eastern Sankhya and Yoga schools of Hindu philosophy (c. 650 BCE), which divided the world into purusha (mind/spirit) and prakriti (material substance). Specifically, the Yoga Sutra of Patanjali presents an analytical approach to the nature of the mind.
Yasuo Yuasa
Yuasa looks at Descartes' dualism, and the contrasting philosophies of idealism with focus on the mind (spirit) and materialism with focus on the body (matter), and re-evaluates them in the light of Eastern non-dualistic thinking. True to Eastern tradition, he emphasizes that there exists no clear distinction between body and mind. While this is mainly an Eastern point of view, Yuasa acknowledged that similar thoughts have been expressed also by some Western thinkers, for example Merleau-Ponty. Yasuo goes further than existing philosophical tradition in postulating that the unity of body and mind is not a natural state or innate relationship, but rather a state to be achieved. He points out the crucial role of self-cultivation for achieving such 'oneness of body–mind'.