Christian theologians have traditionally organized the study of the Lord Jesus Christ into two broad categories: the Person of Christ (his identity as fully God and fully man) and the Work of Christ (what he has done and what it has accomplished for his church). The Christian seasons of Advent and Christmas particularly lend themselves to reflection on the former. As we think about the baby cradled in Mary’s arms, we ask with wonder, “what child is this?” Somehow, the child in the manger is also the One who created and upholds all things, the Eternal Word made flesh, “Very God of Very God.”
An excellent resource for thinking through this great mystery is The Person of Christ by Donald Macleod. It is not a breezy read, but ideal if you are ready to dig in to these docrtinal issues. It is outstanding in its attention to relevant passages of Scripture (including the difficult ones like Mark 13:32), biblical theological implications, and the historic witness of the church. Some of the chapters include discussions on the Virgin Birth, the Pre-Existence of Christ, and the full humanity of Christ. I have found these extremely helpful in my own devotional reflection at Advent, as well as in the preparation of sermons. This book was assigned to me in college, and I have returned to it over and over since then. I highly recommend it!