My father's father served in the trenches in World War I - and came home very mentally ill.  He proceeded to abandon his family and live on the street (in Quebec) - and commit violent crimes.  We look at the millstone metaphor of Jesus'.  He told us that it was better to put a millstone around our necks and jump into the sea than draw someone away from a life of faith.  We'll look at this story, at Capernaum (where ancient Israel made massive millstones and where Jesus was speaking from), and at why my grandfather thought that he was living by this lesson.