The Rule of Exuno Non Fit Nisisunum in the Eyes of Philosophy and Islamic Mysticism, with Emphasis on the Views of Ibn-Arabi and Peripatetics Philosophers

The rule of ‘’Al-Wahid’’ is one of the main philosophical rules, according to which a single cause does not produce more than a single effect: ''exuno non fit nisisunum''.
Despite the consensus which exists over this rule among the philosophers, mystic's words show that they refuse this rule or at least think it is going through a reform process. Regardless of accepting or rejecting the very rule, the main challenge to philosophical and mystical assertion is to determine the instance for the first origin and first cause and explain how can a single cause produce multiplicities. Offering the philosophical and mystical perceptions of this rule and investigating the objections of mystics to philosopher's view, this paper seeks to make explicit the offered instances for the first origin and first cause in the two intellectual systems and explain its assertion concerning the way of producing multiplicities. It also proves that, firstly, regardless of the slight differences between philosophy and mysticism, the very rule is compatible with the mystical principles, and secondly, the objection of mystics to philosophers, views is answerable, even though the mystical assertion is not based on the acceptance or rejection of the mentioned objection.