Rosicrucianism has, in the background, been highly influential in the development of modern society. And is regarded as the occult or mystical source of freemasonry. In the modern era, it is believed to have resurfaced following the discovery of the ancient tomb of Christian Rosencreutz in Germany. It's founder in the modern era is believed by many to have been Francis Bacon. Rosicrucianism derives its mystical knowledge from a variety of sources - Qabbala, Tarot, Bible, Torah and Sepher Yetzirah to name a few and is considered the mainspring of Western esoteric thought.
Solidity is illusory.
The human being is fundamentally a multi-dimensional, immortal entity created by and existing in Spirit. We have multiple bodies, some mortal, some immortal. Experiences on the physical plane feed information back up the system and cause development at the immortal level. The system in not energetically causal in the traditional sense understood by the majority of people. The physical universe in fact exists to facilitate karmic release and evolution, these are its prime motivating functions.