To be constantly without desire is the way to have a vision of the mystery of heaven and earth. For constantly to have desire is the means by which their limitations are seen.
When the highest type of people hear Tao (Truth), they diligently practice it. When the average type of people hear Tao, they half believe in it. When the lowest type of people hear Tao, they laugh at it. If they did not laugh, it would not be Tao.
