etiology

This last point becomes clearer as the central argument of the Ilahiyyat develops from the subject of metaphysics as being qua being; (45) through the presentation of primary notions concerning being, thing, one, necessary, truth, and the primary assents concerning the comprehensive division of existence into necessary existence through another and necessary existence in itself; (46) and the application of these primary principles to the categories, (47) to the transcategorical disjunctives--like universal and particular or cause and effect; (48) and to the aitiological and theological demonstrations of God's existence as the divine necessary existence in itself who is the ultimate uncaused efficient cause of existence, creator of all possible existents, and ultimate end for all creation.