Sound becomes visible in the form of radiance. This shows that the same energy which goes into the form of sound, before it becomes visible is absorbed by the physical body. In that way the physical body recuperates and becomes charged with new magnetism. By a keen study of psychology you will find that singers have a greater magnetism than the average person: because of their own practicing their voice makes an effect upon themselves and they produce electricity in themselves. In that way they are charged with a new magnetism every time they practice. This is the secret of the singer's magnetism.