Besides, every effect that is created in voice, in word, in singing, is created by the nervous power; the whole secret of magnetism is in the nerves. The whole secret of success of a public man, a public person on the stage or in the concert-hall is his nervous power, the success of the lawyer, of the barrister in the court is his nervous power. It will always be found that a good barrister who has made a name has that power, and it is magnetism. Therefore the sign of a person with health, both physical and mental, is that he develops that influence which is expressed by nervous power, and it has its influence upon all things.