The man probably just realized who he really is, where he really
is, and went mad as a result.
But sometimes, a mad man can see things a lot clearer than us
mentally sound folks. Why? Because they are not concerned about
daily living. They have no fear of the real world, they live in a
world only their mind can behold. They have little real concerns in
life.
Some mad people can even look in your eyes and tell you what's your
weakness, what's bothering you in life, what's missing in your
life, and walk away laughing.
Hence, it is my personal believe, that if we are all given complete
enlightenment about our very existence and purpose here, we might
all turn into raving mad people because we can't handle the
TRUTH!