
1) Esoterism 2) Esotery
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https://www.crosswordclues.com/clue/esotericism

Esotericism (or esoterism) signifies the holding of esoteric opinions or beliefs, that is, ideas preserved or understood by a small group of those specially initiated, or of rare or unusual interest. The term derives from the Greek, either from the comparative ἐσώτερος (esôteros), `inner`, or from its derived adjective ἐσωτερι
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http://en.wikipedia.org/wiki/Esotericism

Refers to knowledge suitable only for the advanced, privileged, or initiated, as opposed to exoteric knowledge, which is public. It is used especially for mystical, occult and spiritual viewpoints.
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http://en.wikipedia.org/wiki/Glossary_of_spirituality_terms

• (n.) Esoteric doctrine or principles.
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http://thinkexist.com/dictionary/meaning/esotericism/

(from the article `Hellenistic religion`) ...the material was reinterpreted both in light of common Hellenistic ideals and in accord with the special traditions and needs of the diasporic ... The third type of mysticism claims an esoteric knowledge (hereafter called esoterism) that explores the divine life itself and its relationship to...
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http://www.britannica.com/eb/a-z/e/44

Belief in an interior path where an individual gains insight and salvation from special knowledge (for example, ...
Found on
http://www.encyclo.co.uk/local/20688
Es`o·ter'i·cism noun Esoteric doctrine or principles.
Found on
http://www.encyclo.co.uk/webster/E/67

the state or quality of being esoteric. · esoteric principles or writings.
Found on
https://www.infoplease.com/dictionary/esotericism
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