Of course one may overdo it; one may do it wrongly, and that must be avoided. One may try to experience it before one is ripe enough to experience it. For instance, one may hear this lecture and go before a bank and say: "Money, money, money, money, money", and then come to me and say: "I repeated "money" a thousand times, but money has not come!" That person has not proceeded rightly. Besides that, to make use of such a wonderful thing for the attainment of earthly things is very foolish, because life is an opportunity, and when that opportunity is lost, it is lost for ever. When we use this knowledge for things that are not worthwhile, then the time is lost. Therefore this only proves worthwhile if it is used for the attainment of spiritual knowledge. If we use this secret for the attainment of earthly things, we do not know whether they are good for us or bad. Very often we would love to have this or that, but if it is not good for us we may just as well not have it.