In this God-created world where the only Truth which exists is found solely through Faith, there can be no "proof" of anything else. To attempt (through science or any other man-made minutiae) to prove otherwise is to attempt to prove a negative, which is impossible.
He Is Risen! AMEN!
This is a boilerplate part of much religious doctrine. If the masses get too smart, they might start questioning. So you build in safeguards, warnings.