When we talk about Ancient philosophy, the name and the work one cannot avoid is Aristotle’s. The aim of this paper is topresent Aristotle's view of the philosophy, as well as the division of the science. The main work from which we can read his definition of philosophy is represented in the Metaphysics. In fact, there are several characteristics by which Aristotle explains the philosophy and some of them are: the study of the causes, the science of truth or of being as being. Although here we see number of ways defining the science, they all represent different views on the same science. We meet all things with the help of causes and principles, and in his philosophical work Aristotle brings four main causes: material, formal, active and final. This is the only science that studies being in fullness without neglecting its parts. The whole reality comes down to the fundamental ways of being, and Aristotle's categories represent the first and fundamental difference of beings. The first category is substance. To bring us closer to this concept, he also looks at the combination of matter and form. Matter of the substance could be defined as a thing of which it is composed, and the form as a way in which things are made. Among them, there is a difference between actuality and potency, where we could mark the matter as potency or ability, and the form as the act or realization of matter. At the very least, there is the notion of a stationary driver that represents the God. The God is the highest level of the existence,the highest level ofknowledge, thinking ofthinking, ie. the pureactivity.