93. Is the spirit, properly so called, without a covering, or is it, as some declare, surrounded by a substance of some kind?
"The spirit is enveloped in a substance which would appear to you as mere vapour, but which, nevertheless, appears very gross to us, thought it is sufficiently vaporous to allow the spirit to float in the atmosphere, and to transport himself through space at pleasure."
As the germ of a fruit is surrounded by the perisperm so the spirit, properly so called, is surrounded by an envelope which, by analogy, may be designated as the perispirit.