Christianity puts forward a two things as its direct fact-based proof of its truthfulness: miracles and answers to prayer. The Bible explains that the miracles are God’s way of authenticating that what has been preached as the Word of God is so. Prayers work similarly. When something impossible occurs and the only thing that has changed is that a person has prayed, it is harder to discount the reality that God exists and answers prayer. Cases where an ear or an eye that had been removed is recreated or advanced stages of cancer are healed are not uncommon in the Church today. They are also hard to explain away as anything other than acts of God.