I do not think I can go into any other examples of the methods of training the mind-body, but I think I can risk a generalization. Many such methods, of course, have been empirically devised for particular purposes. And if you examine them all, you will find that they are all illustrations of one single principle, which is, that in some way we have to combine relaxation with activity. Take the piano teacher, for example. He always says, Relax, relax. But how can you relax while your fingers are rushing over the keys? Yet they have to relax.
