One of the most amazing and scandalous things about Christianity is its insistence that in Jesus of Nazareth, God is become Man. Theologians struggled with the Incarnation for centuries; indeed, I doubt whether that struggle may ever end. Probably, not. For, how to comprehend the infinite, compassed in a baby?
The Incarnation is categorically different from all other types of divine participation in history. The countrymen of Jesus tried to apply all of them to him, but without particular success. They are all more or less familiar to us, because they have occurred to us as we ourselves have struggled to understand the Incarnation; and while they all capture a bit of the truth, they are all Christological heresies.