Man is lost and is wandering in a jungle where real values have no meaning. Real values can have meaning to man only when he steps on to the spiritual path, a path where negative emotions have no use.
The Polar Express is about faith, and the power of imagination to sustain faith. It's also about the desire to reside in a world where magic can happen, the kind of world we all believed in as children, but one that disappears as we grow older.