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

The task I want to set myself today is to show that although this spiritual science is intended to be the basis for a popular philosophy for everyone, whatever their level of education, it was necessary, before it was established, to give serious consideration to all questions concerning the limits of philosophy and natural science. Having set this task for myself, as I said, I must also specifically consider the questions as to the limits of scientific knowledge that arise in direct living experience when working with natural science, doing so in a seemingly abstract way.