I once had a friend tell me that he would believe in Jesus Christ if God would write him a message in the sky to prove His reality. He was looking for something big to convince him that Jesus Christ was real and who He really claimed to be. In His wisdom, God designed the credibility of His Word to rise or fall together. It must either all be believed or all be rejected. There is no room to pick or choose parts that we believe and parts that we reject. To reject any part is to reject God. Knowing the magnitude of the faith He was demanding, God designed one proof of His credibility on which everything would rest.