Comparison of the Concept of Perfection in the Definition of Beauty from the Perspective of Avicenna and Aquinas

Defining beauty is one of the most critical issues in philosophical aesthetics. Walking philosophers have brought or referred to the concept of "perfection" as one of the main elements of the definition of beauty. After explaining the views of Avicenna and Aquinas in this field, this research deals with the question of what is the place of the concept of perfection in the definition of the beauty of both of them. This research is descriptive-analytical. In the collection, it uses the library method, and in the analysis, it uses the qualitative method. The results of this research show that beauty is essential in the view of both philosophers about tangibles and abstractions. From Avicenna's perspective, the perfection of the senses should have three aesthetic elements: good order, good composition (composition), and good moderation. Aquinas also uses the concepts of pleasure, proportion, and clarity in his definitions. These elements in the definitions of beauty can be evaluated in some way in connection with the idea of the second perfection.