Abstract

Mental existence refers to the existence of subjects in the mind, whether they are assumed alone or when they stand as subjects of predicates, and whether they enjoy external existence. The perception of mental existence is intrinsic, and everyone will perceive and accept in one's conscience. The problem of mental existence is among the innovations of Muslim philosophers and is unprecedented in Greek. The discussion of this topic is important from two aspects: ontology and epistemology. In both of them, Mulla Sadra has some new and comprehensive views which have led to important consequences in resolving philosophical problems.In the present paper, the writer has dealt with the several aspects of mental existence, Mulla Sadra's innovations in this regard, and the solutions to certain problems found in the light of his innovations