The word for ‘to initiate,’ μυεῖν, means ‘to close,’ and is used for eye and mouth alike. The initiate, μυούμενος, remained passive, but the closing of the eyes and the entry into darkness is something active.
This passage delivers the etymological and phenomenological core of initiation: a paradox of willed surrender, in which passivity itself constitutes an active inner act, anchoring the entire mystery-rite tradition.
, Essays on a Science of Mythology: The Myth of the Divine Child and the Mysteries of Eleusis, 1949thesis