VIII. A Brief Outline of an Approach to Anthroposophy
Spiritual science as described here nowhere contradicts the methods of modern natural science. But science has to admit that with its methods one cannot gain insight into the realm of the spiritual. As soon as the existence of a consciousness other than the ordinary one is recognized, one will find that by it one is led to conceptions concerning the spiritual world that will give to it a cohesion similar to that that natural science gives to the physical world.
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ENAP1973