The spirit world, according to Spiritualism, is the world inhabited by spirits. Though a concept of a spirit world is in the constitution of most religions, it is not "itself the religion". Whereas religion regards an inner life, the spirit world is regarded as an external environment for spirits. Though independent from the natural world, both the spirit world and the natural world are in constant interaction. Through mediumship, these worlds can consciously communicate with each other. The spirit world of Spiritualism can be described by mediums in trance.
By the mid 19th century most Spiritualist writers concurred that the spirit world was of "tangible substance" and a place consisting of "spheres" or "zones". Though specific details differed, the construct suggested organization and centralization. An 18th century writer, Emanuel Swedenborg, influenced Spiritualist views of the spirit world. He described a series of concentric spheres each including a heirarchal organization of spirits in a setting more earth-like than theocentric. The spheres become gradually more illuminated and celestial. Spiritualists added a concept of limitlessness, or infinity to these spheres. Furthermore, it was defined that Laws initiated by God apply to earth as well as the spirit world.
Another common Spiritualist conception was that the spirit world is inherently good and is related to truth-seeking as opposed to things that are bad residing in a "spiritual darkness". This conception inferred as in the biblical parable Lazarus and Dives that there is considered a greater distance between good and bad spirits than between the dead and the living. Also, the spirit world is "The Home of the Soul" as described byC. W. Leadbeater (Theosophist) suggesting that for a living human to experience the spirit world is a blissful, meaningful and life changing experience.
Yet, John Worth Edmonds stated in his 1853 work, Spiritualism, "Man's relation spiritually with the spirit-world is no more wonderful than his connection with the natural world. The two parts of his nature respond to the same affinities in the natural and spiritual worlds." He asserted, quoting Swedenborg through mediumship, that the relationship between man and the spirit world is reciprocal and thus could contain sorrow. Though ultimately, "wandering through the spheres" a path of goodness "is received at last by that Spirit whose thought is universal love forever."
The Spiritualist philosophy affirms that we are, first and foremost, spiritual beings temporarily living in the physical realm with a purpose. The shared belief is that the human consciousness, or soul, continues to exist beyond the physical body. Therefore, life is defined as a continuous learning experience governed by a curriculum that calls for periods in the physical realm until such time that we have learned enough lessons to graduate to a spiritual existence in the spirit world. Given this perspective, Spiritualism sustains the notion of a spiritual evolution, that supports the idea that the elements of the physical and spiritual realm are interconnected and continuously evolving. Many believe that this is where ghosts, or spirits go after they have reached death.