Soren Kierkegaard- "Sickness unto Death", (Princeton University Press 1983) 1848- From- Chapter 1- That 'despair' is the 'Sickness unto Death'- p 9
Man is a spirit. But what is spirit? Spirit is the self. But what is the self? The self is a relation which relates itself to its own self, or it is that in the relation [which accounts for it] that the relation relates itself to its own self; the self is not the relation but [consists in the fact] that the relation relates itself to its own self. Man is a synthesis of the infinite and the finite, of the temporal and the eternal, of freedom and necessity, in short it is a synthesis. A synthesis is a relation between two factors. So regarded, man is not yet a self. …Such a relation which relates itself to its own self (that is to say, a self) must either have constituted itself or have been constituted by another.