<P> Around the year 200, Tertullian formulated a version of the doctrine of the Trinity which clearly affirmed the divinity of Jesus and came close to the later definitive form produced by the Ecumenical Council of 381 . Trinitarians, who form the large majority of Christians, hold it as a core tenet of their faith . Nontrinitarian denominations define the Father, the Son, and the Holy Spirit in a number of different ways . </P> <P> The theology of the attributes and nature of God has been discussed since the earliest days of Christianity, with Irenaeus writing in the 2nd century: "His greatness lacks nothing, but contains all things". In the 8th century, John of Damascus listed eighteen attributes which remain widely accepted . As time passed, theologians developed systematic lists of these attributes, some based on statements in the Bible (e.g., the Lord's Prayer, stating that the Father is in Heaven), others based on theological reasoning . </P> <P> In Islamic theology, God (Arabic: الله ‎ ‎ Allāh) is the all - powerful and all - knowing creator, sustainer, ordainer and judge of everything in existence . Islam emphasizes that God is strictly singular (tawḥīd) unique (wāḥid) and inherently One (aḥad), all - merciful and omnipotent . According to Islamic teachings, God exists without place and according to the Quran, "No vision can grasp him, but His grasp is over all vision: He is above all comprehension, yet is acquainted with all things ." God, as referenced in the Quran, is the only God . Islamic tradition also describes the 99 names of God . These 99 names describe attributes of God, including Most Merciful, The Just, The Peace and Blessing, and the Guardian . </P> <P> Islamic belief in God is distinct from Christianity in that God has no progeny . This belief is summed up in chapter 112 of the Quran titled Al - Ikhlas, which states "Say, he is Allah (who is) one, Allah is the Eternal, the Absolute . He does not beget nor was he begotten . Nor is there to Him any equivalent". </P>

What are three characteristics that all prophets share