But when we consider the part played by the mind we come to see that every word spoken with the mind has a greater action and effect. Furthermore, there is the value attached to the meaning of the word. A person may continually call his son or daughter wise; if they keep on hearing him call them wise they really will become wise. If, however, he calls them stupid the very fact of hearing this makes them stupid in the end. The repetition of the word suggests it to them; that is why it is a great mistake to give nicknames which either have no meaning or only a silly meaning. Even when given in fun, as a joke, they still exert their effect.