15. How Are the Eternal Forces of the Human Soul Investigated?

And when some amateur spiritual scientists, or philosophically nuanced experts, come along and say: Yes, but a thought has an inner quality from which one recognizes that it cannot be absorbed into the body, that it is something other than the body, then one will say, with science that may not yet exist today – but with the ideal of science, which will one day be fulfilled, spiritual science –: there are certain materials that, when exposed to light, absorb it to a certain extent and then continue to radiate it for a while. Will these radiations now be regarded as something that is not based in matter? In the same way, when the external world, the physical, sensory external world, makes an impression on a person, and these thoughts are only retained during our lifetime, when they fluoresce, as it were, out of the physical body, these too should not be regarded as something that is spiritually alone, as something that could have significance for the eternal forces of the human soul. They are phenomena that occur in the physical matter of the human being. Just as electricity occurs in matter. Not in the denial of this justified scientific view, but in the right understanding lies what spiritual science has to do with it.