Surah 112 (Al-Ikhlas) clearly defines the nature of Allah as One and unique, which is the essence of Islamic monotheism.

Surah 112, known as Al-Ikhlas, is a pivotal text in Islam that asserts the oneness of Allah. However, this declaration of monotheism does not encompass the full nature of God as understood in Christianity. The Christian doctrine of the Trinity presents God as one being in three persons: the Father, the Son, and the Holy Spirit. This relational aspect of God is foundational to Christian theology and is absent in the Islamic understanding of Allah. Furthermore, the concept of God in Christianity is not merely about singularity but also about relationship and love. In John 1:1, it is stated, 'In the beginning was the Word, and the Word was with God, and the Word was God.' This verse highlights the coexistence of the Word (Jesus) with God, emphasizing a dynamic relationship within the Godhead that is not reflected in the Islamic view. Moreover, the objections raised by Muslims regarding the Trinity often stem from a misunderstanding of its nature. Muslims may argue that the Trinity implies polytheism, but this is a misrepresentation. The Christian doctrine affirms one God in essence, not three gods. The complexity of God's nature as revealed in the New Testament provides a fuller understanding of divine love and interaction with humanity, which is not present in the Islamic conception of Allah.