  This conscious self-presence is the interiority of the human person, and it is so central to the meaning of the concept of person that one can say that personality signifies interiority to self. Because of the person’s subjectivity, he is not only acted upon and moved by external forces, but also acts from within, from the core of his own subjectivity. Since he is the author of his actions, he possesses an identity of his own making, which cannot be reduced to objective analysis and thus resists definition. This resistance to definition, this irreducibility, do not mean that the person’s subjectivity and lived experience are unknowable, but rather that we must come to know them differently, by a method that merely reveals and discloses their essence. In lived experience of self-possession and self-governance, one experiences that one is a person and a subject, and through sympathy and empathy one experiences the personhood of others. To apply the early terminology with some added modern meanings, the person comprises both an objective subsistence (ύπόστασις) and a subjective subsistence (πρόσωπον).