Benjamin Franklin
There are three things extremely hard: steel, a diamond, and to know one’s self.
Merleau-Ponty
The subject that I am, when taken concretely, is inseparable from this body and this world
Roy Baumeister
Everywhere in the world, self begins with the body
William James
To be conscious means not simply to be, but to be reported, known, to have awareness of one’s being added to that being.