To say,"I know the future," is the work of a fortuneteller. It is not the work of a mystic. At one time you may know the future, and may tell another person. Another time that person may be depending upon your word and you do not know the future. To know and to say nothing is the work of the mystic. To know and to help. To say to another, "Take care. There is a pit." But it is better to say, "Take care because there is a pit," than to say, "Take care, I see you falling." Even that knowledge it is better to hide.