Hierophant

Three occurences:

A hierophant of the bodiless Secrecy
     — Book 2 Canto 6

The prophet hierophants of the occult Law,
     — Book 2 Canto 11

He had caught her hierophant significances
     — Book 5 Canto 2

A hierophant is a person who shows or reveals the sacred truths, and is, therefore, an interpreter of sacred mysteries.

This could only be done by those initiated in the mystery schools and not the temple-keepers of the public, official religion. This is the reason why Hierophant was the title of the chief priest of the Eleusinian Mysteries, which was the school of initiation for advanced seekers in antiquity, which raised one to the degree of contemplation, that of the ’epopts'.