Abstract

As the world's literary, religious, and philosophical traditions attest, deficiency in the world is a matter of perennial human concern. Ontologically speaking deficient existence is a problem that has occupied metaphysical thinking from Heraclitus to Heidegger. What is it to exist deficiently? ;This dissertation addresses the question, first, through a survey of answers given by six ancient philosophers. Parmenides describes deficient existence as changing multiplicity; Plato, as being in an inferior world; Plotinus, as mis-seeing; Augustine, as disorderedness; Gregory of Nyssa, as "nothingification" &parl0;`h e ,xoud e&d12;nwsi v&parr0; ; Dionysius, as failed participation. The dissertation then gives a more systematic answer through close study of the metaphysics of John Scotus Eriugena , who builds on the foundation established by these thinkers. ;The Eriugenian cosmos is a "theophanic" one. To be is to be the showing or expression of God. What exists, then, is divine and good. Furthermore, all deficiencies, such as they are, must be characterized as privations or impoverishments. ;What can deficient existence be in such a world? Eriugena's first answer is that it is existence on an inferior level of reality. This dualistic view must be rejected, however, because it is not consistent with the fundamental metaphysical principles that reality is an ontological unity and every being is divine. ;Two better descriptions of deficient existence can be found in his metaphysics. First, to be deficiently is to see the world deficiently; that is, deficient existence is a misunderstanding of reality. Second, deficient existence is metaphysically incomplete existence. Being as a whole is an ontological work in progress, a creatio ex nihilo that is a creatio ex nihilo hic et illuc et ubique ---here, there, and everywhere. ;Such a creation depends in part on human choice and is subject to the destructive influences of non-being. But rather than a fall from some primordial perfection, creation is a movement towards perfection. Hence the existence that it constitutes is an existence in the theophanic world. Moreover, creation is theophanic to the extent that it does exist, even though, as deficient, it does not yet fully exist