Muslims often argue that the concept of the Incarnation is incompatible with the oneness of God.

The doctrine of the Incarnation is central to Christian belief, asserting that Jesus Christ is both fully God and fully man. This is articulated in the Gospel of John, where it states, 'And the Word became flesh and dwelt among us' (John 1:14), indicating that God took on human form. This does not imply a division in God's nature but rather a unique union of divine and human natures in the person of Jesus. Furthermore, the New Testament presents Jesus as the fulfillment of Old Testament prophecies regarding the Messiah, emphasizing His divine mission to save humanity from sin (Matthew 1:21). Additionally, the concept of the Incarnation is supported by various passages that highlight Jesus' divine attributes, such as His pre-existence (John 1:1) and His role in creation (John 1:3). These affirmations of Christ's divinity coexist with His humanity, as seen in His birth from the Virgin Mary, which was a miraculous act of the Holy Spirit (Luke 1:35). Thus, Christians understand the Incarnation as a profound mystery that reveals God's love and desire for relationship with humanity. Critics may argue that this doctrine contradicts the strict monotheism emphasized in Islam. However, Christians believe that the Incarnation does not compromise God's oneness but rather illustrates the depth of His engagement with creation. The mystery of the Trinity, while complex, is not a contradiction but a revelation of God's nature as relational and loving. In this light, the Incarnation is seen as the ultimate expression of God's commitment to humanity, providing a way for reconciliation through Christ's sacrifice.