the.com/mysticism

means The pursuit of direct, personal union or communion with ultimate reality or the divine, through experience rather than reasoning or ritual alone.

from Traces back to Greek 'mystikos,' meaning 'connected to secret rites,' itself from 'myein' — to close the eyes or lips. The ancient mystery cults initiated members into hidden knowledge that outsiders simply weren't shown, and initiates swore to keep quiet about it (hence the shared root with 'mute'). So the word carries, from birth, this idea of something sealed off from ordinary sight — a truth you can't just be told, only shown, in silence, from the inside.