Like the other five planes of the three lower levels, there is “substance” as well as “laws” relating to its specific nature. The Causal shares the third level with the Mental Plane—which likewise has its unique substance, but the two share the characteristic of five dimensions (in contrast to the familiar three of the Physical and Etheric Planes of the first and lowest level).
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...