Only when the time was right did Jesus come to earth in incarnate form. I return again to McCready where he reminds the reader that of the Godhead—Father, Son, Holy Spirit—“only the Son has changed his situation in such a way that the term preexistence is helpful.” This is an astounding thought that Jesus “changed his situation.” Changing His situation was a sacrifice that is staggering to comprehend.
The lofty and somewhat circular language is purposeful in reminding us that there are some aspects of God that we just can’t explain because they are beyond the scope of our intellect; the created cannot ever fully explain the Creator (cf. Is. 55:8 & Ro. 9:20-21). For instance, how can something exist before existence? What form was the pre-incarnate Christ in? Did His form change once Earth and Man were created (I ask this since there’s a strong possibility that “the angel of the Lord” was the pre-incarnate Christ)? All of these questions are fascinating and worth further exploration if for no other reason but deepening our love for Jesus and what He accomplished on our behalf.
But now I return to the significance of John 17:5 and grasping that Christ was indeed preexistent. Being preexistent means that He was God and He was no less God in His Incarnation. Therefore, Jesus being God in the form of man is Him truly coming into our world from a beyond-our-understanding-existence. Crabb, similarly struggling with trying to grasp the significance of Christ’s departure from His previous existence, once captured what he thought a conversation was like between Father and Son prior to the incarnation:
‘Father, what you ask is painful beyond description to even contemplate. I cannot imagine what the actual experience will be like of not seeing your face. And yet I am delighted with your plan. It will give me the chance to let people see how wonderful you are. The joy of seeing you glorified makes it worth it all. There is no other way?’
The Eternal Community
Imagine the emotional upheaval Jesus went through to comply with the necessity of taking on the form of a Man. He had indescribable joy in what Crabb refers to as the “Eternal Community.” Along with this joy is perfect harmony with the Father and the Holy Spirit; there was nothing disruptive, painful, or evil. That all changed when Jesus entered the world of Man. Here He was treated in shameful and unspeakable ways. Even today no name draws so much elation or hatred as the Name of Jesus Christ.
So often, and rightly, we recognize Jesus for the incredible sacrifice He gave on our behalf while on the earth, mostly focused on the Passion Week. We cite with pomp and ceremony what Jesus endured at the hands of men. Rarely, however, do we ever hear about the sacrifice Jesus made in leaving His ‘Eternal Community’ to enter humanity on our behalf. Not only that, but He entered humanity in the most vulnerable way: an embryo in the womb. I suggest this because we don’t really understand what Jesus sacrificed by leaving His eternal dwelling, so rather than trying to gain a further understanding of that it so we can teach it to others, we avoid it altogether. I don’t say this to be harsh toward anyone, I have spent much time in the pulpit myself, and I would definitely be intimidated by teaching something that is beyond my understanding; I don’t want to look or sound foolish, but even more, I would not want to say anything theologically inaccurate or dishonoring to Jesus. Still, people need to better understand that Jesus’ sacrifice began long before the Passion Week.
Douglas McCready, He Came Down From Heaven: The preexistence of Christ and the Christian faith (Dower’s Grove, IL: Inter Varsity Press, 2005), pp. 12-13.
 Larry Crabb, Connecting: A radical new vision (Nashville, TN: W Publishing Group, 1997), p. 59.
 Ibid., p. 58.