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

I would therefore like to begin this course of lectures by attempting to present the scientific foundations—at least in general terms—for the higher insights sought in this anthroposophy. I am afraid I have to ask your forgiveness especially for today’s lecture which will of necessity be less popular than the three that are to follow. Some of the things I’ll have to say today may sound rather abstract, although they are perfectly real experiences for anyone who works with this particular science of the spirit. Nor will it be possible to characterize every detail of the way in which proofs that will stand up to natural scientific scrutiny have to be found in the present time. The lectures that follow will have to provide individual evidence, especially also with reference to the element of proof in the science of spirit.