It is a three-part soul/Self constituted by Plato which states that our basic emotions such as love, anger, ambition, aggressiveness, empathy.

His ideas follows the view of Plato but adds Christian ideas

A British philosopher and physician who laid the groundwork for an empiricist approach to philosophical questions. Locke’s revolutionary theory that the mind is a tabula rasa, a blank slate on which experience writes, is detailed in his Essay Concerning Human Understanding (1690).

Who's concept is "There is No Self" which states that humans so desperately want to believe that they have a unified and continuous self or soul that they use their imaginations to construct a fictional self. But this fictional self is not real; what we call the self is an imaginary creature, derived from a succession of impermanent states and events?

According to him, this meaning-constructing activity (We construct the self) is precisely what our minds are doing all of the time: taking the raw data of experience and actively synthesizing it into the familiar, orderly, meaningful world in which we live.

He articulated the phenomenologist position in a simple declaration: “I live in my body.” (Example: When you wake up…) The “I” you refer to is a single integrated entity, a blending of mental, physical, and emotional structured around a core identity: your “self”.

Who coins the "Know Thyself"?

He talks the concept of self as "Dualism"

His idea of the self is about "The Self is Consciousness"