عنوان مقاله [English]
In comparison to the principles and methodological problems of both thinkers it should be said that Al-Tusi is influenced by philosophical problems of Peripatetic and the entry of this material in the field of theology, as a result, he has transformed the problems of theology. In proving the exalted Necessity, he did not merely refuse to impossibility of vicious circle and endless chain, rather he demonstrated that proving the Necessity by proposing two conceptual and propositional premise without impossibility of vicious circle and infinite regress. Mulla Sadra, in the light of the founded rules and principles. of the transcendent wisdom, has also taken particular method initiatives. He has, with philosophical premises, presented a new outline of proof from contingency and necessity. and elsewhere he has dealt with the unicity of the necessity of existence and in this passage he has proved being by principality of existence. Hence, this paper uses a descriptive-analytical method, while referring to the manner of arguments and different methods of the Al-Tusi and Sadra for proving the exalted Right, describes the extent and the modes of philosophical influence of each of the two philosophers. Finally, the similar and different achievements and positions of the two thinkers in the fundamentals and method are discussed.