"When Blavatsky occasionally calls someone an Initiate, just what does she mean? As with many terms, Initiation also must have several meanings. One meaning is to be given privy knowledge or teachings in an esoteric school. Another meaning is to go through a ritual or ceremony as an entrance or stage in a fraternity, genuinely esoteric or not. Yet another meaning, and the most important I believe, is to undergo a certain level of mystic experience. The latter in other traditions is called "Enlightenment," "Moksha," "Satori," "Cosmic Consciousness," "Christ Consciousness" and many other terms and allusions. It is probably not arguable that there are different levels of mystic experience and not all of these should be correctly labeled Initiation."
January 1, 1970
https://en.wikiquote.org/wiki/Initiation_(theosophy)