Reza Akbari

How an abstract immaterial being is connected to a physical thing has been viewed variously by western philosophers who considered the issue prior to their Muslim counterparts.Muslim theologians and philosophers, however, developed the related discussions which became heated following the translation of logical books and essays throughout the Translation Era.The focus of this article, besides clarifying the ideas raised by Muslim philosophers in this regard,is to shed light on Mulla Sadra's opinion and its influence on the later philosophers, Abd-ul-Razzaq Lahiji in particular.To explain his opinion,Mulla Sadra primarily brings a proof to establish the unity of the soul,and to prove this,he has refuted the reasons used by the opposing philosophers through negation and affirmation.Using negation,he comments on why there can't be a unity of soul, and then refers to his opponent's inability to distinguish between specific unity and generic unity considering the latter equal to vegetable,animal and human spirits.Soul and body,Mulla Sadra reiterates,are attached to each other in two ways; in one way,soul is attached to body and yet it is contingent on itself and not on the person's being; in the other way,soul is attached to body while the person's potentialities are actualized; this second type of attachment relates to obtaining existential virtues.It must be noted that Mulla Sadra's belief in these two types of attachment results from his belief in the trans-substantial motion in which soul is also involved.Mulla Sadra works out a solution to the question of relation between soul and body and their effects on one another by proposing the mediation of a veiled spirit, since the soul which belongs to a world of pure light does not involve itself directly in the affairs of the dark body. The veiled spirit is as subtle as the non-material soul and as corporeal as it needs in connectionwith body.This view has been argued by Allameh Tabatabii who thinks corporeal qualities and ontological status must be kept separated and not be mixed.Lahiji,on the other hand, seems to have accepted Mulla Sadra's idea looking at it as a philosophical question,not a medical case. He,like Mulla Sadra, while considering unity for soul, thinks of it as having properties such as sensation imagination estimation intellection. According to Lahiji,the unity of soul and body is like the unity of matter and form; however,unlike natural forms,it does not subsist in matter and interestingly,this notion resembles Neo-Platonist views.