"I experienced an invasion of my mind by a transcendentally rational mind, as if I had been insane all my life and suddenly I had become sane."

This has to be experienced. (It's like Jimmy Hendrix says.) I'm not sure I would compare it to puberty, or an invasion. Definitely a visitation, however. It seems the historical successful travellers on the path were in the main fortunate to be born into families of adepts. In many cases it was the father who initiated the son. For others, the cultural milieu typically seeded the necessary symbolic guide posts.

> Reality is that which, even when you downvote it, doesn't go away. ;)

You have perhaps forgotten your own initial encounters with such topics. It is a healthy response of the unprepared psyche to recoil from such content to protect itself; it can be dangerous, as you must know. The third rail is very much alive.