“Have you lost your mind?”  If the judge asks you that, your trial isn’t going well.  But when the king asked Paul that question during his trial, his response was simple.  He said, “You know what the prophets said would happen to the Messiah, and you were around to know what happened to Jesus.  I’m not crazy; I’m telling you things you already know are true.”  He wound up his argument with this:

For the king knows about these things, and to him I speak boldly. For I am persuaded that none of these things has escaped his notice, for this has not been done in a corner.    (Acts 26:26)

“This has not been done in a corner.” 

Think how unique that is.  The origins of most religions are shrouded in secrecy or are at least confined to the personal experiences of their founder.  He says, “Trust me -I had a vision; I found a book… ”  Not Jesus.  He performed His work and delivered His teaching in public, where anyone could see and hear.  When they came to arrest Him, Jesus said,

… “Day after day I sat in the temple teaching, and you did not seize me. But all this has taken place that the Scriptures of the prophets might be fulfilled.”   (Matthew 26:55b-56a)

Two marks of authenticity:  1)The prophets said, “Here’s what God will do; when these things happen, you can be sure it is God’s Messiah.  2) When the events of Jesus’ life fit the pattern including His crucifixion, burial and resurrection, it was all done in public, for all to see.

Books like The DaVinci Code are based on the supposition that the Christian faith is based on a bunch of secret wisdom, carefully hidden from the gullible public.  Nonsense.  With Jesus, nothing was done in the corner.

By the way, Jesus said His second coming would be in plain sight, too.  Something to consider…