Essence and existence or two principle concepts that have been used reciprocally in all Islamic philosophical texts. In the present article we have tried to consider a few rules related to essence from an analytical viewpoint with regard to Ibn sina’s opinions. Three different comments can be made essence. One is the intrinsic approach to essence and the other two are the concrete judgement approaches. The first approach expresses the definitions and concepts of essence and its terminological and concept of essence from two different points of view: one tries to determine how we can categorize it among huam rational concepts as a rational and intrinsic meaning, while the other attempts to clarify the sense of applicability of this concept. As explained by recent scholars, essence is a secondary concept that has originated in the human mind. In ibn sina’s well-known books-insofar as the author of this article has conducted research-no clear discussion can be found on this subject thus, we will first define the meaning and concept of essence and its applicability, then we will study the examples of a human, a stone, and a tree from Ibn sina’s point of view.
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