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.