Preexistence and deity (John 1:1-13), incarnation by virgin birth (John 1:14; Matt. 1:18-23).

No matter how much "data" we have. No matter how much knowledge we have in the Mystery of God, we will never fully comprehend God until we get into heaven. The mystery is this: True faith is not the ability to superiorize unseen things to the satisfaction of our human minds, instead it is the human power to trust God completely. Psalm 48:14 "For this God is our God for ever and ever; he will be our guide even to the end." In Isaiah 55:8-9 God says, "My thoughts are completely different from yours, and my ways are far beyond anything you could imagine. For just as the heavens are higher than the earth, so are my ways higher than your ways and my thoughts higher than your thoughts." I would be careful about limiting to Jesus' incarnation. Before Jesus was born in human form, He always have been FULLY God. Preexistence and deity (John 1:1-13), incarnation by virgin birth (John 1:14; Matt. 1:18-23). After Christ died on the Cross and rose from the dead, His incarnation ceased, and He went back to His eternal self and returned to the Glory. Jesus never changed. Hebrews 13:8 Jesus Christ is the same yesterday and today and forever. Jesus was ALL human (man) and at the same time He is ALL God. During the time of His incarnation, He turned Himself literally into being a servant, with human limitations of His attributes, and limited Himself only to that which the Father willed while AT THE SAME TIME, He had the full Omniscience, Omnipresence, Omnipotence, and Immutability of the Trinity. Again, Jesus never changed. Hebrews 13:8 Jesus Christ is the same yesterday and today and forever.