Why it involved humans. The statistical impossibility of several hundred prophecies fulfilled in one person with poor parents just trying to keep their heads above water, and why God needs human partners. How sins are washed away, and why Christianity is both different and more legitimately held by not just faith, but its very veracity. The beautiful and perfect mix of verifiable fact, purpose, truth itself, and the undeserved transcendence of sinful mankind adopted into the family of the Most Holy God.