spiritist doctrine codified in the 19th century by Allan Kardec From Wikiquote, the free quote compendium
Spiritism is the belief or doctrine that the spirits of the human dead, surviving the death of the physical body, can and do communicate with the living, especially through a person (a medium) particularly susceptible to their influence.
Affections are more solid and lasting among spirits than among men, because they are not subordinated to the caprices of material interests and self-love.
I am Ra. The Law of One, though beyond the limitations of name, as you call vibratory sound complexes, may be approximated by stating that all things are one, that there is no polarity, no right or wrong, no disharmony, but only identity. All is one, and that one is love/light, light/love, the Infinite Creator.
Do not place the words of gurus, ministers, priests, scientists, psychologists, friends -- or my words --higher than the feelings of your own being. You can learn much from others, but the deepest knowledge must come from within yourself. Your own consciousness is embarked upon a reality that basically can be experienced by no other, that is unique and untranslatable, with its own meaning, following its own path of becoming.
Roberts, Jane (1974). The Nature of Personal Reality. Prentice-Hall. Reprinted 1994, Amber-Allen Publishing. ISBN 1-878424-06-8. p. 433-434.
When you have entered into the land that Jehovah your God is giving you, you must not learn to imitate the detestable practices of those nations. There should not be found in you anyone who makes his son or his daughter pass through the fire, anyone who employs divination, anyone practicing magic, anyone who looks for omens, a sorcerer, anyone binding others with a spell, anyone who consults a spirit medium or a fortune-teller, or anyone who inquires of the dead. For whoever does these things is detestable to Jehovah, and on account of these detestable practices Jehovah your God is driving them away from before you. You should prove yourself blameless before Jehovah your God.
Now the works of the flesh are manifest, and they are fornication, uncleanness, loose conduct, 20 idolatry, practice of spiritism, enmities, strife, jealousy, fits of anger, contentions, divisions, sects, 21 envies, drunken bouts, revelries, and things like these. As to these things I am forewarning YOU, the same way as I did forewarn YOU, that those who practice such things will not inherit God’s kingdom.
Anyone conquering will inherit these things, and I will be his God and he will be my son. 8 But as for the cowards and those without faith and those who are disgusting in their filth and murderers and the sexually immoral and those practicing spiritism and idolaters and all the liars, their portion will be in the lake that burns with fire and sulfur. This means the second death.
Outside are the dogs and those who practice spiritism and those who are sexually immoral and the murderers and the idolaters and everyone who loves and practices lying.
For Jung, the 'psychic world' (i.e. the world of the mind) was an independent reality, and it was possible to travel there and make the acquaintance of its inhabitants.
Colin Wilson in Rudolf Steiner: The Man and His Vision, p. 164 (1985)
Taken as a whole, the Cross Correspondences and the Willet scripts are among the most convincing evidence that at present exists for life after death. For anyone who is prepared to devote weeks to studying them, they prove beyond all reasonable doubt that Myers, Gurney, and Sidgwick went on communicating after death.