Jesus came for one purpose, so many say. But I think there is more to the story. Jesus came to offer himself up on the cross, Jesus came to forgive sins, Jesus came to heal, Jesus came to be the light and the life for all, and much more. Jesus also came to show us what it meant to be human, and this was very necessary.
Adam was a human being. Had Adam continued under God's direction and instruction, Adam would have been the human we all should have been. Instead, Romans 5 tells us, Adam chose his own road, we might say the road of humanity but I am not so sure. Maybe Adam chose a road that was not truly human. Maybe Adam chose a road that lead away from humanity and we have been on that alternate road for so long that we do not even know what the right road looks like.
God tried to remind humanity of what it meant to be human many times. The offer was always there. God tried through individuals, God tried through a nation. God did not fail, humanity did, and continues to fail. We always chose our own way. Part of being human is the ability to choose. The first human chose and sent all the rest down the same road. It is the road that you sometimes look up from and realize that you are going the wrong way. At times when you realize you are going the wrong direction you might try to redirect or recalculate (like Google maps does, recalculating...). The problem is that we all recalculate with Adam's faulty directions. It is very hard, very difficult as seen in Romans 7. We forget, every day, that the realest human being already gave us directions. This man even narrowed it down to the simplest possible way.
Jonathan Mitchell gives us an excellent view of John 1:4.
"And the life was continuing being, and began progressively existing as, the Light of mankind (or: Furthermore, the Light progressively came to be the life known as "humanity," and was for human beings; or: Then the life was existing being the light from the humans)."
I have always loved that translation. Jesus came as a human being (Philippians 2:5-11) and not only that, but he progressively became human thereby showing us what it means to be human. Jesus became the perfection that Adam should have been. Jesus shows us, yesterday, today, and in the future, what the right choice was and is. He gives us the answer to the question, what does it mean to be human?
Being human is not undesirable. Any thought of a future escape from humanity is, in my opinion, the wrong answer. Just because we may be looking forward to, as Paul did in Romans 7, relief from the flesh, does not mean we will not be human. Jesus as a man in absolute perfection sits next to our Father in heaven. The flesh does not make us human, it is only part of our current existence. When God made man, God declared it was very good. The hosts of heaven shouted for joy.
God knows what it means to be human, and God wants us to know as well. A written record has been provided, the map of the correct road.