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.
French philosophy
The Duration can only be grasped through intuition, the sympathy by which one is transported into an object to grasp what is unique and ineffable within it. Intuition is a complete philosophical method that involves placing oneself within the Duration, and expanding it into a continuous heterogeneity, differentiating the extremities within it to create a dualism, before showing them to in fact be one. An example of this is Duration itself, which is neither a multiplicity or a unity. But depending on which point of view one recreates it from, one will either reconstruct it as a unity or a multiplicity. Hence substance pluralism and substance monism are in fact two representations of the same phenomenon.