V. Can a method of gaining insight into spheres beyond the sense-perceptible world be given a scientific basis?

Psychologists who must be taken seriously, particularly because they are natural scientists—take Ziehen, for instance, or Wahle, or whoever you will—find it possible to show a degree of relationship between the structure of thinking and the structure of the nerves, the brain, and the like. You always see a degree of satisfaction when people succeed in expressing something which is spiritual in the structure of thinking in terms of organic structures, especially in scientific psychology. They are always wrong, of course. The day after tomorrow we’ll see how strange it is for people to believe that the life of the soul comes from the brain. It is just as if one were to believe—if this is a mirror and you go over there and think that the individual who is coming towards us—which is our own image—must be coming from behind the mirror. It depends on the nature of the mirror—if it is level or curved—what kind of image comes to meet us. Still, there’s nothing behind the mirror. Someone looking for something behind the limits set for us by nature, and behind the human brain, which merely mirrors the inner life, is just like the person who smashes the mirror in order to find the reason for the image that comes to meet him in it.