Analysis of the Basis and Arguments of the Theory of "Active Intellect" in Islamic Philosophy

One of the influential topics in Islamic philosophy is the issue of "active intellect". This term has entered Islamic philosophy from Aristotle's philosophy and some interpreters of Aristotle's works. Islamic philosophers interpreted this issue in the context of their philosophical system and by expanding its concept from the field of natural and industrial (artistic) phenomena to the field of epistemology; they gave it a significant role. These philosophers have presented two types of arguments to prove the active intellect. Some of these arguments are formulated based on the theory of the nine spheres and according to the principle of causality. These arguments attemt to prove efficient causes for the existence of spheres and introduce ultimate causes for their rotational movements. Arguments of the second category also attempt to prove active intellect by relying on principles such as "every event and contingent needs an efficient cause" and "lacking a thing, it is not given to it". In this article, these arguments have been examined and finally, it has been concluded that the arguments of the first category are vulnerable and invalid due to the invalidity of their basis (planetary theory); and the arguments of the second category can only prove non-material and efficient cause or causes, provided that their premises are true, not the active intellect, i.e., the tenth intellect.