It is important for us to have an understanding of the doctrines that make up our faith. That doesn't mean that we need to know all the ins and outs of theology, but it does mean we should have a basic understanding of theology.
One of those areas we should have a basic understanding of is the incarnation of Jesus. The reason this is important is because it is foundational to Christianity. Not only is it foundational, but it is also difficult to understand. If we don't understand where the doctrine of the incarnation comes from, it would be easy to give up.
Greg Boyd at ReKnew wrote this short post on the Scriptural background for Jesus being both God and man.
In the previous post I argued for the logical possibility of the Incarnation, so today I’d like to establish its biblical foundation. This will be review for some readers, but it’s important review because this doctrine is the absolute bedrock of the Christian faith. For example, this doctrine alone is what allows us to claim that God’s eternal nature is revealed in the unsurpassable love that was demonstrated on the cross (I Jn 3:16). If the one who died a human death on the cross was something less than God, then God is something less than unsurpassable love. What concerns me is that more and more “progressive minded” Christians are beginning to question the validity of this doctrine.
To begin, while some people in the ancient world denied it (they were called “docetists”), the New Testament is very clear that Jesus was fully human. He had to grow in wisdom (Lk 2:52) and learn obedience by going through trials, just like every other human being (Heb. 5:8). He grew hungry and tired, like the rest of us. He experienced the same range of emotions as the rest of us and was tempted in all the ways we are (4:15). He was, and is, human in every respect that we are human.
See more at ReKnew: Was Jesus Fully a God and Fully Man?