Book excerpt: Sound and Light, hearing and sight, are always associated. But sound is seen before it is heard. It is useless to demand or expect from the learned men of our age that which they are absolutely incapable of doing for us, until the next cycle changes and transforms entirely their inner nature by “improving the texture” of their spiritual minds. Unless there is an opening, however small, for the passage of a ray from a man’s higher self to chase the darkness of purely material conceptions from the seat of his intellect, his task can never be wrought to a successful termination. For the sun needs an eye to manifest its light. And this, we think, is the case with the materialist: he can judge psychic phenomena only by their external aspect, and no modification is, or ever can be, created in him, so as to open his insight to their spiritual aspect.