Here’s one to think about: they killed Christ and he came back. Now, how much thinking can overcome fact?
That’s what I say, that some things, such as The Resurrection, and The Acsendence, and all of the miracles of Jesus and His disciples, will require faith. So do the unfulfilled future prophecies (though the past ones, naturally, have been proven). True Bible-believing Christianity will always require faith-many verses in the Bible call us to the innocent, trusting faith of a child, or as small a faith, at times when its all we can muster, as that of a mustard seed, because it can yet move mountains. God has always held back on proving His existence to us and asking us to have faith, to trust Him.