Existence-Essence in Philosophy of Thomas Aquinas and Mulla Sadra

Thoughts of Thomas Aquinas and Molla Sadra، because of relying on religious beliefs، are based on the word “Existence”. Among the philosophers of middle ages، Thomas Aquinas grasped the prominence of existence on essence. What for Thomas has the first importance، in fact، is the prominence of existence، and also Molla Sadra in Islamic philosophy، with taking the existence (not existent)، as the issue of metaphysics، created a new revolution in Islamic thought. However Thomas Aquinas and Molla Sadra have no difference in believing in supreme essence and its attributes، but in expressing، describing and explaining the structure of essence، they have some differences. Here، we tried to compare this two philosopher’s opinions on the issue of being and essence، or existence and essence