The incarnation of Christ is the mystery of all mysteries...

Christ was Himself without spot or stain of sin, but having taken the nature of man, He was exposed to the fiercest assaults of the enemy, to his sharpest temptations, to the keenest of sorrow. He suffered being tempted. He was made like unto His brethren, that He might show that through the grace given, humanity could overcome the temptations of the enemy.... Listen to His words, “Lo, I come: in the volume of the book it is written of me, I delight to do thy will, O my God: yea, thy law is within my heart” (Psalm 40:7, 8). Who is it that thus announces His purpose of coming to this earth? Isaiah tells us: “Unto us a child is born, unto us a son is given: and the government shall be upon his shoulder; and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace” (Isaiah 9:6).

“In the beginning was the Word, and the Word was with God, and the Word was God.... All things were made by him; and without him was not any thing made that was made. In him was life; and the life was the light of men.” “And the Word was made flesh, and dwelt among us” (John 1:1-3, 14)....

“Without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.” “Wherefore God also hath highly exalted him, and given him a name which is above every name: that at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth; and that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.” “... Who is the image of the invisible God, the firstborn of every creature” (1 Timothy 3:16; Philippians 2:9-11; Colossians 1:14, 15).

The incarnation of Christ is the mystery of all mysteries.  HP 41

Morning and evening the heavenly universe behold every household that prays, and the angel with the incense, representing the blood of the atonement, finds access to God.  Pr 190

"Who, being in the form of God, thought it not robbery to be equal with God:  But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men:  And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross."  Philippians 2:6-8 (King James Version)