Jesus Christ is the only Son of God, the Creator of everything we see (and don’t see). How do we know? Well besides the fact that the prophets of old all knew He was coming, He confirmed it himself. Was He crazy? Well everything He said would happen did come true. Was He the devil? Well with all the good he did in the world, healing the sick and even raising the dead that theory doesn’t hold up either.
Some say that He was just a prophet or a really good guy. Yeah, but why would a really good guy do so many amazing things but then lie about being the son of God, that's just crazy? Did He really rise from the dead? Well after being declared dead after a very public execution, He revealed himself to hundreds of men and women.
Now, if Jesus was either a fraud or a lunatic, then it is crazy to call Him a good man, much less a great moral teacher. On the other hand, if we bomb the notion that He was either lying or insane, then only one conclusion remains: Jesus is who He says He is… The Son of God sent to save us from the shackles of sin.