If what the Bible says about Jesus Christ is right and true, then of necessity it is something that transcends human intellect and reason. “Quite right,” you say. “I cannot understand miracles.” Of course you cannot; no one can understand a miracle. It would cease to be a miracle if you could. “I cannot grasp the supernatural.” Most certainly you cannot. There never has been a man who could understand the doctrine of the Incarnation. I think of the Incarnation, and I take my stand on the side of the apostle Paul who said, “Great is the mystery of godliness.” My mind is too small to understand it; my intellect cannot span the infinities and the immensities and the eternities. My little pygmy reason and logic are not big enough to see or to take in such a conception as the self-emptying and the humiliation of the Son of God.
I do not claim to understand it; who could understand an idea such as the Virgin Birth? It is beyond understanding; it is beyond reason. Who can understand the doctrine of the two natures of Christ, unmixed, remaining separate, unmingled and yet both there, still only one person? We cannot understand the doctrine of the Trinity— the Father, Son, and Holy Spirit, and we should never try to do so.
The claim of the Gospel is that it is in a realm that is beyond human reason and understanding. It is a revelation, a statement that comes to us, an announcement; it is the gift of God. That is why instead of reasoning around and around in circles and trying to span and grasp the infinite and the everlasting, I say, go to Him!
– Martyn Lloyd-Jones and Robert Backhouse, Walking with God Day by Day: 365 Daily Devotional Selections, (Wheaton, IL: Crossway, 2013).