Some have stated that the longest journey is the 18 inches from the head to heart, as if there is some sort of separation between the two things.  Poppycock!  One could say conversely that the longest journey is the 18 inches from the heart to the mind!  Let's get away from splitting theological hairs and just speak to the whole of man.  Let's speak to man's reasoning as well as his affections.  If one hasn't been awakened by the Spirit above, they are still dead in sin and knoweth not the Lord!