"The development of a more refined theology of the Incarnation resulted from the response of the early church to various misinterpretations concerning the question of the divinity of Jesus and the relationship of the divine and human natures of Jesus. The Council of Nicaea (AD 325) determined that Christ was “begotten, not made” and that he was therefore not creature but Creator. The basis for this claim was the doctrine that he was “of the same substance as the Father.” The doctrine was further defined by the Council of Chalcedon (AD 451), at which it was declared that Jesus was perfect in deity and in humanity and that the identity of each nature was preserved in the person of Jesus Christ. The affirmation of the oneness of Christ with God and with humanity was made while maintaining the oneness of his person."