4. Inner Mobility of Thought
So you see that the human being, as he lives on the physical plane, develops something in regard to the spiritual worlds which can be a seed for experiences in these higher worlds. The etheric body of man as it is in the physical world is not only his life-principle, but it is at the same time an instrument of preparation for unfolding understanding of the vowels of the spiritual world. And the physical body also is an instrument of preparation for experiencing the consonants of the spiritual world.
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