A treatise on the Aristotle's ontological theory of modality

In this thesis I will try to give an overall picture of the Aristotle's theory of modality. One of the richest concepts in the history of philosophy, modality, bears special importance to understand the underlying mechanism of Aristotle's metaphysics. In the first chapter I will start with the explanation of logical possibility and make a clear distinction between epistemological and ontological analysis of modality. Second chapter will focus on the inner construction of the potential and actual being in the context of ontology and metaphysics. Pointing out the line of reasoning from mutable substances to absolutely actual and necessary ones, I will also elucidate on the conception of necessity and causality. In the third chapter there will be an inquiry that attempts to answer the question whether Aristotle's view has still a relevance to the problem of possibility and actuality. Finally, I will discuss the development from the concept of substance to the infinite being of God, who is the real origin of finite beings.