On a scientific basis, it's more than just "Power of Positive Thinking" -- it has a horrible, horrible dark side. Like if you get ill, it's because you've just been thinking negative thoughts.
A nivel científico, es más que "El Poder del Pensamiento Positivo" tiene una horrible, horrible parte oscura. Como, si te enfermas, es solamente por que has estado pensando en pensamientos negativos.