Christ the Mediator: the Westminster Confession of Faith
"The Son of God, the second Person in the Trinity, being very and eternal God, of one substance, and equal with the Father, did, when the fullness of time was come, take upon him man's nature, with all the essential properties and common infirmities thereof; yet without sin: being conceived by he power of the Holy Ghost, in the womb of the Virgin Mary, of her substance. So that two whole, perfect, and distinct natures, the Godhead and the manhood, were inseparably joined together in one person, without conversion, composition, or confusion. Which person is very God and very man, yet one Christ, the only Mediator between God and man. " (Westminster Confession of Faith, VIII.II)
Where do I begin! Well, I suppose I'll begin by saying, "no, I'm not a Presbyterian." That said, I do respect the work of the learned men of England from 1646, but that should not implicate me in agreement with their every statement. Which ones with which I differ is a topic for another time.
Let's begin with the first clause. I have spent the past three weeks writing about Christ's deity and the implications of Christ's deity. However, in this first clause of the confession's statement about Christ and the hypostatic union, we see clearly the cost of taking on human nature: infirmities. Not merely servanthood, but a weakness not worth comparing with God's omnipotence. Not merely sickness, but mortality. He did not, however, take on the sinful nature that is the weakest part of us all. How?
Christ's link to Adam was broken. Being made of the substance of Mary, He was not conceived of Adam (Joseph). Whether you believe in seminal or federal original sin (or have no decided position), one thing is certain: sin is passed on via the male of our species, a necessary contributor to each new person... except for Christ.
Finally, at the heart of the Hypostatic Union, these two natures were joined "without conversion, composition, or confusion." Without conversion: neither nature was modified to fit the other. Without composition: the natures did not combine in such a way so as to compose a new nature. Without confusion: the two natures did not blend together, each taking attributes of the other. Jesus was both fully God and fully Man.
So, what does this mean for us? In short, it means that when we read that we were called to emulate Christ, we should first understand that we were called to emulate God. However, the truth does not end there. See, it was not until the New Testament, when God was revealed in the flesh as Christ, the Son, that He commanded His followers to imitate Himself. We aren't called to the impossible task of imitating the Almighty God the Father, but the prototypical man Jesus Christ. In imitating Jesus, we reflect God's glory on earth as He did. Jesus lived His life as a man—learning as we do, feeling as we do, and even tempted as we do—and yet was without sin, the exact representation of the Glory of God (Heb. 1:3). That is a model we can follow if we face life as Christ did—a student of the scriptures, devoted in prayer, and submitted to God's will.