Spiritualism

Spiritualism is a belief that spirits of the dead have both the ability and the inclination to communicate with the living. The afterlife, or "spirit world", is seen by spiritualists, not as a static place, but as one in which spirits continue to evolve. These two beliefs: that contact with spirits is possible, and that spirits are more advanced than humans, leads spiritualists to a third belief, that spirits are capable of providing useful knowledge about moral and ethical issues, as well as about the nature of God. Some spiritualists will speak of a concept they refer to as a "spirit guides"–specific spirits, often contacted, who are relied upon for spiritual guidance.Spiritism, a branch of spiritualism developed by Allan Kardec and today found mostly in Continental Europe and Latin America, especially Brazil, emphasizes reincarnation.

Spiritualism developed and reached its peak growth in membership from the 1840s to the 1920s, especially in English-speaking countries. By 1897, spiritualism was said to have more than eight million followers in the United States and Europe, mostly drawn from the middle and upper classes.

Idealism

In philosophy, idealism is the group of philosophies which assert that reality, or reality as we can know it, is fundamentally mental, mentally constructed, or otherwise immaterial. Epistemologically, idealism manifests as a skepticism about the possibility of knowing any mind-independent thing. In a sociological sense, idealism emphasizes how human ideas—especially beliefs and values—shape society. As an ontological doctrine, idealism goes further, asserting that all entities are composed of mind or spirit. Idealism thus rejects physicalist and dualist theories that fail to ascribe priority to the mind.

The earliest extant arguments that the world of experience is grounded in the mental derive from India and Greece. The Hindu idealists in India and the Greek Neoplatonists gave panentheistic arguments for an all-pervading consciousness as the ground or true nature of reality. In contrast, the Yogācāra school, which arose within Mahayana Buddhism in India in the 4th century CE, based its "mind-only" idealism to a greater extent on phenomenological analyses of personal experience. This turn toward the subjective anticipated empiricists such as George Berkeley, who revived idealism in 18th-century Europe by employing skeptical arguments against materialism.

Idealism (Christian eschatology)

Idealism (also called the spiritual approach, the allegorical approach, the nonliteral approach, and many other names) in Christian eschatology is an interpretation of the Book of Revelation that sees all of the imagery of the book as symbols.

Jacob Taubes writes that idealist eschatology came about as Renaissance thinkers began to doubt that the Kingdom of Heaven had been established on earth, or would be established, but still believed in its establishment. Rather than the Kingdom of Heaven being present in society, it is established subjectively for the individual.

F. D. Maurice interpreted the Kingdom of Heaven idealistically as a symbol representing society's general improvement, instead of a physical and political kingdom. Karl Barth interprets eschatology as representing existential truths that bring the individual hope, rather than history or future-history. Barth's ideas provided fuel for the Social Gospel philosophy in America, which saw social change not as performing "required" good works, but because the individuals involved felt that Christians could not simply ignore society's problems with future dreams.