Between the body and the soul there is another instrument which is recognized by scientists and mystics as inexplicable; that is the mind. The scientists call it the brain, but the brain is but the instrument of the mind, and the mind goes beyond it. Plainly speaking, it may be said that the mind is the instrument of the soul and the body is the instrument of the mind, but both mind and body are the instruments of the soul. Although these instruments give the soul knowledge of things clearly, these instruments at the same time limit the power of the soul.