hierophant

Webster's Dictionary (1913)

Origin: L. hierophanta, hierophantes, Gr. ἱεροφάντης; ἱερός sacred + φαίνειν to show, make known: cf. F. hiérophante.

The presiding priest who initiated candidates at the Eleusinian mysteries; hence, one who teaches the mysteries and duties of a religion or an arcane discipline; an expositor; as, In his television series “Cosmos”, Carl Sagan became the foremost hierophant of modern cosmology.. Abp. John Potter Syn. — mystagogue.

2. an advocate or spokesperson.

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54 · with additions: GCIDE editors