Both Christian and Muslim theologians confess the perfect divine theology. Divine perfection relates to a state of completeness or absolute wholeness meaning that the greatest conceived being has no ontological deficiencies, has no flaws, and does not depend on anything else. There is no greater being that can be thought of which deserves human worship except the greatest conceived being. This concept can be demonstrated with the following equation: Maximally good + Maximally perfect = Maximally great.
This paper/presentation seeks to test which worldview (Islam or Christianity) is consistent with the perfect-divine theology by using the measure of the relationality of God as an attribute of essence. The paper/presentation argues that the Islamic presentation of tawḥīd (absolute oneness) portrays God as contingently relational, especially before the creation of the world. Allah was alone with no other person to communicate with, and all his divine communicative attributes were dysfunctional before the existence of the creation. The doctrine of the Trinity, on the other hand, portrays God as eternally relational because of the three persons of the Trinity who have been in an eternal relationship with each other since eternity. The Islamic shortcoming in the divine nature affects the greatness of the divine, whereas the trinitarian advantage fulfills the criteria of the greatest conceived being.