摘要：We firstly find traces of systematical and com-prehensive thought related to existence of the universe in Plato and Aristotle. Plato, by the doctrine of ideas which is the basis of his whole philosophy, accepted that the objec-tive world was to be composed of shadows, and he pro-pounded that the essential was in ideal world. On the con-trary, Aristotle has shaped his thoughts related to being by conception made individual substances as base, and he de-fended that Platonic idealism was only a conceptual struc-ture and the truth was not composed of absolute forms or ideas but it was to be consist of indivisible unity of them. In this paper it will briefly be dealt with the bases of both conceptions.
关键词：Theory of forms; being; the first matter; uni-verse; substance; potentiality; actuality; reason.
